Question

minta tolong dibantu buat besok​

Answer 1

Jawaban:

1. r = √s² - t²

r = √20² - 12²

r = √400 - 144

r = √256

r = 16

Ls = π x r x s

Ls = 3,14 x 16 x 20

Ls = 1.004,8 cm²

2. Keliling = 2 x π x r

31,4 = 2 x 3,14 x r

31,4 = 6,28 x r

r = 31,4 : 6,28

r = 5 cm

t = √s² - r²

t = √13² - 5²

t = √169 - 25

t = √144

t = 12 cm

3. d = 14 cm

r = 14 : 2

r = 7 cm

s= √r² + t²

s = √ 7² + 24²

s = √ 49 + 576

s = √625

s = 25 cm

Ls = π x r x s

Ls = 3,14 x 7 x 25

Ls = 549,5 cm²

4. d = 24

r = 24 : 2

r = 12

Luas Krucut tanpa alas

L = π x r x s

L = 3,14 x 12 x 13

L = 489,84 cm²