If the height of a triangle is increased by 25%, the bottom should be () A. Decrease by 25% B, decrease by 25% C, increase by 25% Decrease by 25%, decrease by 20%, increase by 25%

If the height of a triangle is increased by 25%, the bottom should be () A. Decrease by 25% B, decrease by 25% C, increase by 25% Decrease by 25%, decrease by 20%, increase by 25%

If the height of a triangle is increased by 25%, the bottom should be (reduced by 20%) to keep the area of the triangle unchanged
This is because:

If the bottom of a triangle is reduced by one third and the height is increased by 25%, then its area is ()

（1-1/3）x(1+25%)=2/3x5/4=5/6
Its area is 5 / 6 of the original
Click comment in the upper right corner, and then you can select satisfied, the problem has been solved perfectly

If the base a of a triangle is increased by 5 cm and the height h of the triangle is decreased by 5 cm, then H-A =?

5
(a+5)*(h-5)=ah
ah-5a+5h-25=ah
-5a+5h=25
h-a=5

If the bottom edge a of a triangle increases by 4cm and the height h of the edge decreases by 4cm, the area of the triangle remains unchanged and the value of H-A is calculated
When the bottom edge a of the triangle increases by 4cm and the height h of the edge decreases by 4cm, the area of the triangle remains unchanged?
(please give reasons)

S=(1/2)ah=(1/2)*(a+4)*(h-4)
therefore
ah=(a+4)(h-4)
ah=ah-4a+4h-16
4(h-a)=16
h-a=4(cm)