Answer:
The measure of the missing angle is 50°.
Explanation:
☆A triangle equals 180°.
☆A right angle equals 90°
☆We have two angles given to us, however one out of the two angles might be tricky for some to figure out.
☆An angle, we obviously see, is 40°.
☆The right angle, (the one with a box) equals 90°, so therefore, the value of that angle is 90°.
☆In order to find the value of the last angle, we are going to have to subtract the sum of both numbers from 180°.
☆We are subtracting it from 180° because a triangle equals 180°.
☆An equation would look like:
☆The X indicated in the equation represents the unknown angle.
☆Let's solve the equation.
☆
☆Without an equation, you could just add both angles, and subtract it from 180.
☆
☆Therefore, the missing angle is 50°.