Right Triangle Trig Practice

Front

What is the definition of a right triangle?

Back

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

Front

What are the three sides of a right triangle called?

Back

The three sides are called the hypotenuse (the longest side), the opposite side (opposite the angle of interest), and the adjacent side (next to the angle of interest).

Front

What is the Pythagorean theorem?

Back

The Pythagorean theorem states that 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

Which trigonometric function is used to find the cosine of an angle?

Back

Cosine is defined as the ratio of the length of the adjacent side to the length of the hypotenuse.

Front

Which trigonometric function is used to find the sine of an angle?

Back

Sine is defined as the ratio of the length of the opposite side to the length of the hypotenuse.

Front

Which trigonometric function is used to find the tangent of an angle?

Back

Tangent is defined as the ratio of the length of the opposite side to the length of the adjacent side.

Front

What is the mnemonic to remember trigonometric ratios?

Back

Soh Cah Toa.

Front

If the hypotenuse is 10 and the adjacent side is 8, what is the cosine of the angle?

Back

Cosine = adjacent/hypotenuse = 8/10 = 0.8.

Front

If the opposite side is 6 and the hypotenuse is 10, what is the sine of the angle?

Back

Sine = opposite/hypotenuse = 6/10 = 0.6.

Front

How do you find the missing angle in a right triangle if you know the other two angles?

Back

The sum of angles in a triangle is 180 degrees. Subtract the sum of the known angles from 180 degrees to find the missing angle.