Geometry Chapter 4 Triangles Test 2024

Front

What is a triangle?

Back

A triangle is a polygon with three edges and three vertices. It is one of the basic shapes in geometry.

Front

What are the types of triangles based on side lengths?

Back

1. Equilateral: All sides are equal. 2. Isosceles: Two sides are equal. 3. Scalene: All sides are different.

Front

What are the types of triangles based on angles?

Back

1. Acute: All angles are less than 90 degrees. 2. Right: One angle is exactly 90 degrees. 3. Obtuse: One angle is greater than 90 degrees.

Front

What does CPCTC stand for?

Back

CPCTC stands for 'Corresponding Parts of Congruent Triangles are Congruent.' It is used to prove that corresponding parts of congruent triangles are equal.

Front

How do you find the measure of an unknown angle in a triangle?

Back

Use the triangle sum theorem, which states that the sum of the angles in a triangle is 180 degrees. If you know two angles, subtract their sum from 180 to find the third angle.

Front

What is the Pythagorean theorem?

Back

Front

What is an isosceles triangle?

Back

An isosceles triangle is a triangle that has at least two sides of equal length. The angles opposite those sides are also equal.

Front

What is the difference between congruent and similar triangles?

Back

Congruent triangles are identical in shape and size, while similar triangles have the same shape but may differ in size. Their corresponding angles are equal, and their sides are proportional.

Front

What is the formula for the area of a triangle?

Back

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle measuring exactly 90 degrees.