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Luden [163]
3 years ago
8

Angle r° = 2w°. What is the measure of angle r°?

Mathematics
Poor dude in need of advice
2 years ago
Answer doesn't work very well when instead of 127, it's 111
1 answer:
stira [4]3 years ago
8 0

Answer:

Option B. 286 degrees

Step-by-step explanation:

see the attached figure with letters to better understand the problem

step 1

Find the measure of angle BAD in triangle A

m\ BAD+127^o=180^o ----> by supplementary angles (form a linear pair)

m\ BAD=180^o-127^o=53^o

step 2

Find the measure of angle ABD in triangle A

we know that

The sum of the interior angles in any triangle must be equal to 180 degrees

so

m\ BAD+m\ ADB+m\ ABD=180^o

we have

m\ BAD=53^o

m\ ADB=90^o

substitute

53^o+90^o+m\ ABD=180^o

143^o+m\ ABD=180^o

m\ ABD=180^o-143^o

m\ ABD=37^o

step 3

Find the measure of angle w

we know that

m\ ABD+w=180^o ----> by supplementary angles (form a linear pair)

we have

m\ ABD=37^o

substitute

37^o+w=180^o

w=180^o-37^o

w=143^o

step 4

Find the measure of angle r

we have

r=2w ----> given problem

substitute the value of w

r=2(143^o)=286^o

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