tolong dijawab......

19.
d² = p² - (R + r)²
d² = 25² - (5 + 2)²
d² = 625 - 7²
d² = 625 - 49
d = √576
d = 24 cm

20.
R = r + √p² - l²
R = 4 + √26² - 24²
R = 4 + √676 - 576
R = 4 + √100
R = 4 + 10
R = 14 cm