Question

Tolooooong plissssssssss

Answer 1

T = 12 cm
a = 20 cm
L = a × t
= 12 × 20
= 240 cm2

Answer 2

13.

180        = (x + 15 )+ (4x+15)
              = x+15+4x+15
              = x + 4x +15+15
180        = 5x +30
180 - 30 = 5x
150        = 5x
150:5     = x
30          = x

∠A
x+15
30+15
45


∠B
4x+15
4(30) +15
120 + 15
135

∠D 
= 180 - ∠B
= 180 - 135
= 45° (B)

14.
L = a x t
   = 20 x 12
   = 240 cm² (C)

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