Geometry: Semester 1 Review

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the probability formula for landing inside a circle?

Back

Probability = (Area of circle) / (Total area).

Front

If the length of a rectangle is 9 units and the width is 5 units, what is the area?

Back

Area = 9 × 5 = 45 units squared.

Front

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

Back

180 degrees.

Front

If one angle of a triangle is 90 degrees and another is 51 degrees, what is the measure of the third angle?

Back

Third angle = 180 - (90 + 51) = 39 degrees.

Front

What is the relationship between the angles in a linear pair?

Back

The angles in a linear pair are supplementary, meaning they add up to 180 degrees.

Front

What is the formula for finding the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is the Pythagorean theorem?

Back

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

Front

If a triangle has sides of lengths 3, 4, and 5, is it a right triangle?

Back

Yes, because 3² + 4² = 5².

Front

What is the definition of complementary angles?

Back

Complementary angles are two angles whose sum is 90 degrees.