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3 years ago

I don't understand 11a or b. Please help.

Mathematics

2 answers:

qaws [65]3 years ago

5 0

11a

you need to work out the length of the 3 line segments and add them to find the perimeter
HJ = HK = 15
and JK = 1/2 * HJ = 1/2 * 15 = 7.5

Therefore perimeter = 15 + 15 + 75. = 37.5

11b
4x + 3x + 2x = 63
9x = 63
x = 7

so HJ = 4x = 4*7 = 28

ipn [44]3 years ago

4 0

11a
HJ=HK
HJ=2JK
HJ=15=HK
15=2jk
7.5=jk
15+15+7.5=37.5=HJK
11b
HJ=4x
HK=3x
JK=2x
9x=63
x=7
HJ=4x
HJ=4(7)=28

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