Geometry and TrigonometryEasyAcute angles of a right triangle
Geometry and Trigonometry practice question
In a right triangle, one of the acute angles measures 35°. What is the measure, in degrees, of the other acute angle?
Answer: 55
The angles of a triangle add to 180°, and the right angle takes 90°, so the two acute angles add to 90°: 90 − 35 = 55.
Common wrong answers
- If you answered 35
- The two acute angles are equal only in a 45°-45°-90° triangle. Here they are 35° and 55°.
- If you answered 65
- 65 is 100 − 35 or a similar slip; the acute angles add to exactly 90.
- If you answered 145
- 145 is 180 − 35, forgetting that the right angle uses 90° of the total.
More Geometry and Trigonometry questions
- Easy
Two angles of a triangle measure 40° and 75°. What is the measure of the third angle? - Easy
A triangle has a base of 10 and a height of 6. What is its area? - Easy
In a 30°-60°-90° right triangle, the shorter leg (opposite the 30° angle) has length 6. What is the length of … - Easy
A rectangle has a length of 8 and a width of 3. What is its perimeter? - Easy
A closed rectangular box has a length of 5 inches, a width of 4 inches, and a height of 3 inches. What is the … - Easy
In the xy-plane, a circle has center (2, −5) and radius 3. Which equation represents this circle?
Not affiliated with the College Board. SAT is a trademark of the College Board.