Question

Somebody help me please asap!

Answer 1

50

Explanation:

6+18+6+20=50

Answer 2

Explanation:

14.

altitude=√(8²-4²)=4√(2²-1²)=4√3

15.

x÷6=cos 60°

x=6×cos 60°=6×1/2=3

perimeter=18+6+(3+18+3)+6=54

16.

10√3÷PQ=sin 30°=1/2

PQ=20√3

10√3÷PR=sin 60°=√3÷2

PR=2×10√3÷√3=20

QR=√(20²+(20√3)²)

=√(400+1200)

=√1600

=40

perimeter=20+40+20√3=60+20√3