482,576 views
21 votes
21 votes
Help please! find m∠bcf

Help please! find m∠bcf-example-1
User SWilk
by
3.0k points

2 Answers

9 votes
9 votes

Answer:

m<BCF=140°

Explanation:

first find m<BCD

m<BCD=180-50-90

m<BCD=40°.

to find m<BCF, we can do 180-m<BCD, since m<BCD and m<BCF add up to 180° (they form a straight angle)

180-m<BCD=m<BCF

180-40=m<BCF

m<BCF=140°

User Aleh
by
2.9k points
15 votes
15 votes

Answer:

BCF = 140°

See attached image.

Help please! find m∠bcf-example-1
User Krishna Majgaonkar
by
2.9k points