Question

28 dan 29. mohon bantuannya. #h-1

Answer 1

28.

besar sudut RS = 360 - (180 + 40 + 60)
= 360 - 280
= 80 derajat

60 derajat = 12 cm
80 derajat = x cm

60x = 12 * 80
60x = 960
x = 960 / 60
x = 16 cm
-----> D.

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GSPD = √P² - (R + r)²
= √25² - (15 + 9)²
= √625 - (24)²
= √625 - 576
= √49
= 7 cm