Angles in Right-Angled Triangles

What is the measure of angle A if angle B is 30° in a right-angled triangle?

• 45°

• 75°

• 60°

• 90°

Calculate the missing angle in a right triangle where one angle is 45°.

• 90°

• 60°

• 30°

• 45°

If the opposite side is 5 cm and the adjacent side is 12 cm, what is the angle opposite the 5 cm side?

• 30 degrees

• 22.62 degrees

• 15 degrees

• 45 degrees

Using the sine ratio, find the angle if the opposite side is 7 and the hypotenuse is 10.

• 44.427 degrees

• 30 degrees

• 90 degrees

• 60 degrees

In a right triangle, if one angle is 60°, what is the other non-right angle?

• 45°

• 30°

• 15°

• 75°

If the lengths of the two legs of a right triangle are 3 cm and 4 cm, what is the angle opposite the 3 cm side?

• 45 degrees

• 36.87 degrees

• 90 degrees

• 60 degrees

Determine the angle using cosine if the adjacent side is 7.07 and the hypotenuse is 10.

• 30 degrees

• 36.87 degrees

• 60 degrees

• 45 degrees

What is the relationship between the angles in a right triangle?

• The sum of the angles is 180 degrees.

• The sum of the two non-right angles is 90 degrees.

• The two non-right angles are equal.

• The right angle measures 60 degrees.

If angle C is 30° and side a is 5 cm, what is the length of side b using the tangent ratio?

• 2.89 cm

• 3.50 cm

• 4.25 cm

• 5.75 cm

Find the angle if the opposite side is 9 and the adjacent side is 15.59.

• 30 degrees

• 36.87 degrees

• 60 degrees

• 45 degrees