Tuesday

September 16, 2014

September 16, 2014

Posted by **Ryan** on Sunday, November 29, 2009 at 7:56pm.

- Geometry plz help -
**MathMate**, Sunday, November 29, 2009 at 9:46pmThere are two ways to approach the problem:

1. Calculate the side lengths, a,b and c.

ab=28....(1)

ac=20....(2)

bc=70....(3)

Therefore by dividing ac by bc, we get

a/b=2/7

substitute a=2b/7 into equation (1) gives 2b/7*b=28 => b²=98 => 7√2

You can calculate similarly the other sides.

2.

You are looking for the product abc, from which ab=28

So

abc=ab*bc*√((a/b)/ab)

All the products are known, the quotient has been calculated in part 1.

So the volume abc can be calculated directly.

- Geometry plz help -
**Ryan**, Monday, November 30, 2009 at 7:31pmumm still lost.....

- Geometry plz help -
**MathMate**, Monday, November 30, 2009 at 11:15pmDid you try method 1 or method 2?

**Answer this Question**

**Related Questions**

Math - Find the surface area of rectangular pyramids 1. Length= 1.15ft Width=0....

MATHS - Hi Just checking The area of one face of a cube is 64cm squared What it ...

solid mensuration - : in the pyramid shown in the figure , AB=9 in ., BC= 12in ,...

geometry - The length of each edge of a trianglar tent if 8 ft. ( 3 sides and a ...

Math - A rectangular prism has a volume of 960cm. It's width, length, and ...

Calculus, Surface Area - An open rectangular box (no top) has a square base with...

6th grade math - Having problems with surface area of a triangular prism. I know...

math - Suppose a rectangular box with 3cm height, 2cm width, and 5cm length was...

physics - A large cube (one side measuring 1.0 m) is submerged in water, with ...

Math--Volume and Surface Area - The volume of a cube is 125 cubic inches. Find ...