yang tugas mandiri 7 yao

1. Lsegitiga = a x t x 1/2 = (8 + 14 + 8) x 8 x 1/2 = 30 x 8 x 1/2 = 120cm2
Lpersegi = s x s = 14 x 14 = 196cm2
Ltotal = Lsegitiga + Lpersegi = 120 + 196 = 316cm2

2. Lpersegipanjang = p xl = 15 x 18 = 270cm2
Ltrapesium = 1/2 x jlmsisisejajar x t = 1/2 x (31 + 15) x 6 = 1/2 x 46 x 6 = 138cm2
Ltotal = 270 + 138 = 408cm2

3. Lpersegi = s x s = 12 x 12 = 144dm2
L2segitiga = 2 x 1/2 x a x t = 12 x 9 = 108dm2
Ltotal = 144 + 108 = 252dm2

4.Lpersegipjg = p x l = (52 - 12 - 20) x 27 = 20 x 27 = 54cm2
Lpersegipjg = p x l = 12 x (27 - 15) = 12 x 12 = 144cm2
Lpersegi = s x s = 20 x 20 = 400cm2
Ltotoal = 54 + 144 + 400 = 598cm2

5. L1/2lingkaran = 1/2 x 22/7 x r x r = 1/2 x 22/7 10,5 x 10, 5 = 173,25cm2
Ltrapwsium = 1/2 x jmlsisisjjr x t = 1/2 x (25 + 43) x 21 = 1/2 x 68 x 21 = 34 x 21 = 714cm2
Ltotal = 173,25 + 714 = 887,25cm2