20 points and brainliest! it will tell me which ones are wrong! megan constructed triangle abc. in megan’s triangle, m∠a is represented by x°, m∠b is 4 times greater than m∠a, and m∠c is 30° less than 5 times m∠a. m∠a = x° m∠b = (4x)° m∠c = (5x − 30)° what is the measure of each angle in megan’s triangle? 1) m∠a = ° a) 21 b) 20 c) 36 d) 30 2) m∠b = ° a) 80 b) 84 c) 120 d) 112 3) m∠c = ° a) 85 b) 75 c) 82 d) 120

<A =21

<B = 84

<c = 75

Step-by-step explanation:

<A =x

<B = 4x

<C =5x-30

The sum of A+B+C = 180

 x+ 4x + 5x-30 = 180

Combine like terms

10x -30 = 180

Add 30 to each side

10x-30+30 = 180+30

10x = 210

Divide by 10

10x/10 = 210/10

x= 21

Since x =21 we can find the value of the angles

Substituting x into the equations for angles A, B and C

<A =21

<B = 4x = 4*21 = 84

<C = 5x-30 = 5*21-30 = 105-30 = 75

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)