Question

Tolong dong yg no.4 luas nya yg tau aja

Answer 1

1/2×10×10=
5×10=
50



MAaf klw salah

Answer 2

D:10cm
r:d per 2 = 10cm dibagi 2= 5 cm
luas=π ×r×r=3,14×5×5×1cm2=78,5cm2.
bangun 2=
a=10-5=5cm
t=10-5=5cm
luas=a×t di bagi 2=5cm×5cm di bagi 2=12,5cm2