20-03-2019
Mathematics

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What’s this answer ? Please help!!!

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EdwardYang EdwardYang

20-03-2019

Surface area = Area of rectangle + Areas of triangles.

Area of rectangle = 9cm * 15cm = 135cm2.

Areas of triangles = 6cm * 3cm = 18cm2.

Surface area = 135 + 18 = 153cm2

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