Geometry- Triangles Unit Review

Front

What is the reason these triangles are congruent?

Back

SAS (Side-Angle-Side) congruence states that if two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, then the triangles are congruent.

Front

Solve for x: 2x + 3 = 13

Back

x = 5

Front

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.

Back

180°

Front

Classify the triangle by angles and sides: A triangle with one right angle and all sides of different lengths.

Back

Right Scalene

Front

State if the triangles are congruent and why: Two triangles with two angles and the included side equal.

Back

ASA (Angle-Side-Angle) congruence states that if two angles and the included side of one triangle are equal to two angles and the included side of another triangle, then the triangles are congruent.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height

Front

What is the Pythagorean Theorem?

Back

In a right triangle, a² + b² = c², where c is the hypotenuse.

Front

Define an equilateral triangle.

Back

An equilateral triangle is a triangle in which all three sides are equal in length and all three angles are equal, each measuring 60°.

Front

What is the difference between acute, right, and obtuse triangles?

Back

Acute triangles have all angles less than 90°, right triangles have one angle equal to 90°, and obtuse triangles have one angle greater than 90°.

Front

What does it mean for triangles to be similar?

Back

Triangles are similar if their corresponding angles are equal and their corresponding sides are in proportion.