Answer: Angle A= 135 degrees and Angle B= 45 degrees
Step-by-step explanation:
Supplementary means two angles added together to make 180.
Angle A= 3x and Angle B= x
So 3x +x =180
4x=180 divide both sides by 4
x =45
So Angle A = 3 times 45 =135 degrees
Angle B= the value of x which is 45 degrees
Answer:
21,850
Step-by-step explanation:
850 x 5 = 4,250
17,600 + 4250 = 21,850
Answer:
BC ≈ 19.4 cm
Step-by-step explanation:
Using the cosine ratio in the right triangle
cos71° =
=
=
( multiply both sides by BC )
BC × cos71° = 6.3 ( divide both sides by cos71° )
BC =
≈ 19.4 cm ( to 3 significant figures )