Find the value of the marked angles in each of the following ( see image ). Please show workings.

The only given angle is 40°

The angle to look for is marked by “))”​

50°

Step-by-step explanation:

Assumed that 40° is the angle of the smaller triangle.

The missing angle is complementary with 40° as part of similar triangles and intercepted arcs.

Its measure:

90° - 40° = 50°

When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates. if you have a multiple-unit rate such as 120 students for every 3 buses, and want to find the single-unit rate, write a ratio equal to the multiple-unit rate with 1 as the second term.