A. 2√5
B. 2√13
C. 5
D. 2

Answer:
A. 2√5
Step-by-step explanation:
hypotenuse (h) = 6
base (b) = 4
perpendicular (p) = ?
We know by using Pythagoras theorem
p = √h² - b²
= √ 6² - 4²
= √ 20
= 2√5
Hope it will help :)