Ask a New Question

Question

two equal sides of an isoscles triangle with fixed based 'a' are decreasing at the rate of 9cm/second how fast is the area of triangle decreasing when the two sides are equal to 'a'
12 years ago

Answers

Steve
if the sides are of length s and the triangle has height h,
s^2 = (a/2)^2 + h^2
the area
z = 1/2 ah
= 1/2 a √(s^2-(a/2)^2)
dz/dt = as/(2√(s^2-(a/2)^2)) ds/dt
so, when s=a,
dz/dt = a^2/(2√(3a^2/4)) (-9)
= -9a/√3
= -3√3 a

as usual, check my math
12 years ago

Related Questions

ONe of the equal sides of an isosceles triangle is 3m less than twice its base. the perimeter is 44m... What has 4 equal sides, and both paris of opposite sides are parallel but it dose not contain a righ... one of the equal sides of an isoceles triangle is 3m less than twice its base. The perimeter is 44m.... two sides are equal other than third side perimiter of triangle is28 find each side of triangle Each of the equal sides of an isosceles triangle is 7 cm longer than the other side. The perimeter... The two equal sides of an isosceles triangle are each equal to 13 inches. If the third side is inc... How many sides of equal length does a 50k coin have A rhombus has 4 equal sides. What is the order of rotational symmetry for a rhombus? 1 2 3 4 How many Equal sides in square ⬛? Square with equal sides of 12 but inner square removed of 2 x2 what’s the area of the remaining sect...
Ask a New Question
Archives Contact Us Privacy Policy Terms of Use