Unit 4 Sem. 1 Review

Front

What is the relationship between the sides in a 30-60-90 triangle?

Back

In a 30-60-90 triangle, the lengths of the sides are in the ratio 1:√3:2. The shortest side is opposite the 30° angle, the longer leg is opposite the 60° angle, and the hypotenuse is opposite the 90° angle.

Front

How do you find the short leg if the long leg is given in a 30-60-90 triangle?

Back

To find the short leg, divide the length of the long leg by √3.

Front

How do you find the long leg if the short leg is given in a 30-60-90 triangle?

Back

To find the long leg, multiply the length of the short leg by √3.

Front

How do you find the hypotenuse if the short leg is given in a 30-60-90 triangle?

Back

To find the hypotenuse, multiply the length of the short leg by 2.

Front

How do you find the hypotenuse if the long leg is given in a 30-60-90 triangle?

Back

To find the hypotenuse, multiply the length of the long leg by 2/√3.

Front

What type of triangle has angles of 45°, 45°, and 90°?

Back

This is a 45°-45°-90° triangle.

Front

What is the relationship between the sides in a 45°-45°-90° triangle?

Back

In a 45°-45°-90° triangle, the lengths of the legs are equal, and the hypotenuse is √2 times the length of each leg.

Front

How do you find the angles in a triangle if one angle is known?

Back

The sum of the angles in a triangle is always 180°. Subtract the known angle from 180° to find the sum of the other two angles.

Front

What is the sum of the angles in any triangle?

Back

The sum of the angles in any triangle is 180°.

Front

If one angle in a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.