Question

Picture question middle school math

Answer 1

ANSWER 4) 36 m²

Area of trapezium = (1/2)×(sum of parallel side) × distance between parallel side

Area of trapezium = (1/2) × (6m+12m)×(4m)

Area of trapezium = (1/2)×18m × 4m

Area of trapezium = (1/2) × 72 m²

Area of trapezium = 36m²

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ANSWER 5) 20 sq.unit

Area of irregular polygon = sum of area of rectangle abof + sum of area of rectangle ocde

Area of rectangle abof = ab × af

Area of rectangle abof = 4 × 3 unit²

Area of rectangle abof = 12 unit²

Area of rectangle ocde = oc × oe

Now ,

• oc + bo = bc

oc + af = bc. [ bo = af ]

oc + 4 = 8

oc = 8-4

oc = 4 units

• oe + ef = ab

oe + 1 = 3

oe = 3 - 1

oe = 2 units

AREA of rectangle ocde = 4 × 2

Area of rectangle ocde = 8 unit²

Area of irregular polygon = Area of rectangle abof + area of rectangle ocde

Area of irregular polygon = 12 + 8 unit²

Area of irregular polygon = 20unit²

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