Friday

December 19, 2014

December 19, 2014

Posted by **Anonymous** on Saturday, April 28, 2012 at 12:44am.

2.The perimeter of an isosceles trapezoid is 40 ft. Thr bases of the trapezoid are 11ft and 19 ft. Find the area of the trapezoid.

- Geometry -
**Reiny**, Saturday, April 28, 2012 at 9:03am1. base -- b

height ==h

bh = 216

2b + 2h = 66

b+h = 33

h = 33-b

then b(33-b) = 216

b^2 - 33b + 216=0

(b-24)(b-9) = 0

b = 24 or b=9

if b=24, h = 33-24 = 9

if b = 9 , h = 33-9 = 24

the rectangle is 24 by 9, (you can call either one the base, then the other is the height)

2. Make a sketch, label each of the equal sides x

construct right-angled triangles at each end

So you have a rectangle + 2 equal right-angled triangles

in each of those triangles, the hypotenuse is x

the base is 4

Find the height using Pythagoras,

the rest is easy.

**Answer this Question**

**Related Questions**

geometry - Find the perimeter of an isosceles trapezoid with base lengths of 10 ...

geometry - Find the perimeter of an isosceles trapezoid with base lengths of 10 ...

algebra - sooo confusing... 6. (¼ + 7/8)(9/13) A81/13 B17/104 C81/104 D17/29 E17...

geometry isosceles - Find the altitude, perimeter and area of an isosceles ...

geometry - The perimeter of the rectangle is 19 inches. The perimeter of the ...

geometry - the perimeter of a rectangle is 72. the base is 3 times the height ...

2nd grade math - If you have a rectangle with 24 square units 3 lines down 8 ...

algebra - a1. Simplify 5 + (7-1)2/6 A11 B41/6 C51/6 D7 E17/6 F23 b2. Simplify (...

math - one of the two numbers that can be both the perimeter and the area of the...

geometry - ABCD is an isosceles trapezoid with a height of 4 inches and bases of...