Question

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Answer 1

Answer:

1) 2(12+8) = 2(20)= 40 cm

2) 360- (45+75+140) = 360-260= 100°

3) greatest angle 120°

4) i) true

ii) false

Answer 2

Answer:

1) 40cm,  2) x = 100, 3) greatest angle = 6(20) = 120,  4) True

5) False

Step-by-step explanation:

1) perimeter = 2(a+b)

a = 12cm

b = 8cm

p = 2(12+8)

2(20) = 40cm

2) The sum of all angles of a quadrilateral = 360

45 + 75 + 140 + x = 360

x = 360 - 260

x = 100

3) The sum of all angles of a quadrilateral = 360

let the common ratio be x

2x + 5x + 5x + 6x = 360

18x = 360

x = 360 /18

x = 20

greatest angle = 6(20) = 120

4) True

5) False