For δabc, m∠a = 2x m∠b = x m∠c = 3x what is m∠c? a. 20° b. 30° c. 90° d. 120°

The sum of the 3 angles of a triangle need to equal 180 degrees.

Using the information in the problem you have:

2x + x + 3x = 180

Simplify:

6x = 180

Divide each side by 6:

X = 180 / 6

x = 30

Angle C = 3x = 3(30) = 90 degrees.

The answer is C.

answer is 12345678900987654321234567890987654321

step-by-step explanation:

answer:   28.56 feet (approx)

step-by-step explanation:

since, triangle abc has measure of angle c equal to 55 degrees, measure of angle abc equal to 90 degrees, and length of bc equal to 20 feet.

we have to find out the measurement of segment ab.

therefore, tan 55° =

but bc = 20 feet.

⇒ tan 55 ° =  

⇒ ab = 20 × tan 55 °

⇒ ab = 20 × 1.42814800674

⇒ ab = 28.5629601348   ≈ 28.56 feet