What is a triangle Grade 7?

Triangles are polygons with three sides. Scalene triangles have all sides with a different length and all angles with a different measure. Isosceles triangles have two sides with the same length and two angles with the same measure.

What is a triangle definition Class 7?

A triangle, you have seen, is a simple closed curve made of three line segments. It has three vertices, three sides and three angles.

What is a triangle in math definition?

What are triangles? A triangle is a three-sided polygon, which has three vertices. The three sides are connected with each other end to end at a point, which forms the angles of the triangle. The sum of all three angles of the triangle is equal to 180 degrees.

How do you explain a triangle to a child?

A triangle is a shape formed when three straight lines meet. All triangles have three sides and three corners (angles). The point where two sides of a triangle meet is called a vertex.

What are the types of triangles Class 7?

The Triangle & Its Properties - Chapter 6 - Introduction - Class 7

What is the best definition of a triangle?

What are Triangles? A triangle is a closed, 2-dimensional shape with 3 sides, 3 angles, and 3 vertices. A triangle is also a polygon. The above figure is a triangle denoted as △ABC.

What is the rule of a triangle?

Triangle Properties

The sum of all the angles of a triangle (of all types) is equal to 180°. The sum of the length of the two sides of a triangle is greater than the length of the third side. In the same way, the difference between the two sides of a triangle is less than the length of the third side.

What are 5 facts about triangles?

A triangle is a two-dimensional shape with three straight sides and three angles. A triangle has three sides, three vertices, and three angles. The sum of the three interior angles of a triangle is always 180°. The sum of the length of two sides of a triangle is always greater than the length of the third side.

What are the 3 parts of a triangle?

A triangle has three sides, three angles, and three vertices. The sum of all internal angles of a triangle is always equal to 180^°. This is called the angle sum property of a triangle. The sum of the length of any two sides of a triangle is greater than the length of the third side.

What words describe a triangle?

What are the 3 sides of a triangle called?

In a right triangle, the hypotenuse is the longest side, an "opposite" side is the one across from a given angle, and an "adjacent" side is next to a given angle.

Does a triangle have 4 sides?

Every triangle has three sides and three angles, some of which may be the same. The sides of a triangle are given special names in the case of a right triangle, with the side opposite the right angle being termed the hypotenuse and the other two sides being known as the legs. All triangles are convex and bicentric.

How many angles does a triangle have?

A Triangle has three angles A, B, and C. Angle A equals 60, Angle B equals 84.

What is triangle and answer?

In Geometry, triangles are the type of polygons, which have three sides and three vertices. This is a two-dimensional figure with three straight sides. A triangle is considered a 3-sided polygon. The sum of all the three angles of a triangle is equal to 180°. The triangle is contained in a single plane.

Why is it called a triangle?

Triangle comes from the Latin word triangulus, "three-cornered" or "having three angles," from the roots tri-, "three," and angulus, "angle or corner."

What are the lines on a triangle called?

A triangle is formed when three straight line segments bound a portion of the plane, The line segments are called the sides of the triangle. A point where two sides meet is called a vertex of the triangle, and the angle formed is called an angle of the triangle, The symbol for triangle is △ .

What are the 4 main triangles?

Equilateral: all 3 sides and angles same. Acute isosceles: 2 sides and angles same, all angles less than 90 degrees. Acute scalene: all sides and angles different, all angles less than 90 degrees. Obtuse isosceles: 2 sides and angles same, one angle greater than 90 degrees.

What is a triangle with 3 unequal sides called?

A scalene triangle has three unequal sides. It also has three. unequal angles. On the other hand, an equilateral triangle is one in which the length of all sides are equal.

Why triangle is the strongest?

Triangles are the strongest shape there is. Any weight placed on them is evenly distributed on all 3 sides. They represent geometric sturdiness; no matter how much weight you put on any side, it will not break.

Why triangle is so important?

They are one of the first shapes studied in geometry. Triangles are particularly important because arbitrary polygons (with 4, 5, 6, or n sides) can be decomposed into triangles. Thus, understanding the basic properties of triangles allows for deeper study of these larger polygons as well.

Why is triangle is important?

But triangles aren't just mathematically significant, they are also fundamental to the way we build our environments, both physical and virtual. Triangles are special because they are exceptionally strong. Out of all the two-dimensional shapes we can make out of straight struts of metal, only a triangle is rigid.

Do 3 points always make a triangle?

If you have 3 points, it always makes a triangle. Get the ends of the 3 lines, and see if there are 3 pairs that are equal. A triangle has 3 points, not three lines.

How do you find sides of a triangle?

Is a triangle always 360?

The angle sum of a triangle will always be equal to 180°. The angle sum of a quadrilateral is equal to 360°, and a triangle can be created by slicing a quadrilateral in half from corner to corner. Since a triangle is essentially half of a quadrilateral, its angle measures should be half as well. Half of 360° is 180°.