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adelina 88 [10]
3 years ago
10

Can someone help me. Please

Mathematics
1 answer:
Lerok [7]3 years ago
6 0

Step-by-step explanation:

a. the angle B in triangle ABC:

180-47=133°

angle C in ABC:

180-(40+133)=7°

using sine rule:

a/sin A= b/sin B= c/sin C

50/sin 7= BC/sin 40

BC= (50*sin40)/ sin7

=263.7 m

b.sin 47= opposite/hypotenuse

sin 47= CD/263.7

CD= sin 47*263.7

= 192.9

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