Find the missing angle measure. Then classify the triangle by its angles.

Question

A right triangle with angles x degrees and 65 degrees.
A. 25º, right
B. 25º, acute
C. 65º, right
D. 65º, acute

Answer 1

To find the missing angle measure, we can use the fact that the sum of the angles in a triangle is always 180 degrees. Since we know that one angle is 90 degrees (it's a right triangle), and another angle is 65 degrees, we can set up an equation:

x + 90 + 65 = 180

Simplifying this equation, we get:

x + 155 = 180

Subtracting 155 from both sides, we get:

x = 25

So the missing angle measure is 25 degrees.

Since one angle is 90 degrees, this triangle is a right triangle. And since one angle is acute (less than 90 degrees) and the other angle is a right angle, we can classify this triangle as a right triangle with one acute angle.

Therefore, the answer is A. 25º, right.