Thursday

October 23, 2014

October 23, 2014

Posted by **Katie** on Wednesday, June 13, 2012 at 4:21pm.

Round your answer to the nearest tenth.

- geometry -
**Reiny**, Wednesday, June 13, 2012 at 5:07pmLook at one of the five isosceles triangle

each has a 72 degree angle with sides of 10 containing that angle.

Use the cosine law to find the base of that triangle

x^2 = 10^2 + 10^2 - 2(10)(10)cos 72

x = ...

Once you have that, find the area of the triangle (1/2)(10)(10sin(above angle)

then multiply by 5

**Answer this Question**

**Related Questions**

Math, Geometery - Hey Guys I have a problem like on the kids on here. What is ...

Math Hw - Completed the following table for a pentagon. Regular Pentagon side ...

Math - Regular Pentagon side length(inches) - 6,8,10,12 Perimeter(inches...

MATH - regular pentagon Side length(inches) 6 If its 6 what is the perimeter( ...

Geometry - *These are regular polygons* 1.Find the area of a triangle with an ...

geometry - the lengths [in inches] of two sides of a regular pentagon are ...

math - A REGULAR HEXAGONAL PYRAMID HAS A SIDE LENGTH OF 3 INCHES A SLANT HEIGHT ...

Geometry - Problem : Howm do you find the area of a circle circumscribed about a...

geometry - the base of a right triangular prism has a width of 8 inches and a ...

Geometry - Hi, I'm having a difficult time understanding a couple of Geometry ...