Geom 1st Sem. Final Rev. Big Ideas

Front

Are the triangles congruent? If yes, why?

Back

Yes, they are congruent by SSS (Side-Side-Side) congruence postulate.

Front

How many triangles exist with the given angle measures: 55°, 45°, 90°?

Back

No triangle exists.

Front

The altitudes of a triangle intersect at the _________________________.

Back

Orthocenter.

Front

The sides of an equilateral triangle have...

Back

equal measures.

Front

What is the definition of congruent triangles?

Back

Triangles that are identical in shape and size, meaning their corresponding sides and angles are equal.

Front

What is the sum of the interior angles of a triangle?

Back

180°.

Front

What is the Pythagorean theorem?

Back

In a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the other two sides (a² + b² = c²).

Front

What is an isosceles triangle?

Back

A triangle with at least two sides of equal length.

Front

What is the formula for the area of a triangle?

Back

Area = 1/2 * base * height.

Front

What is the circumcenter of a triangle?

Back

The point where the perpendicular bisectors of the sides intersect; it is the center of the circumcircle.