matematika nih ada yang bisa no 22 dan 23

22.
d² = p² - (R + r)²
p² = d² + (R + r)²
p² = 25² + (15 + 5)²
p² = 625 + 20²
p² = 625 + 400
p = √1025

23.
RU = 1/2 (6)
RU = 3

PU² = PR² - RU²
PU² = 5² - 3²
PU² = 25 - 9
PU = √16
PU = 4
t = 4

L = a x t / 2
L = 6 x 4 /2
L = 24/2
L = 12

S = 1/2 K
S = 1/2 (6 + 5 + 5)
S = 1/2 (16)
S = 8

r = L / S
r = 12 / 8
r = 3/2
r = 1,5

Semoga Membantu. Kalau gk jelas tanya