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## Algebra II with Trig Ch1.3 #73

How do we work Algebra II with Trig Chapter 1.3 #73? Solution

a) Area after purple section cut out

A = (20 times 20) – 4(x^2) = -4x^2 + 400 = -4(x^2 – 100)  = -4(x + 10)(x – 10)

b) V = Area of bottom times height = (20-2x)(20-2x) x = (400-80x+4x^2)x = 4x^3 – 80x^2 + 400x = 4x(x^2 – 20x + 100)

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## Geometry Ch1.3 #23

Question from Stacy:

Chapter 1, Lesson 3, pg. 23, Set III, How to get an equilateral triangle by rearranging the polygons you cut out from the figure. (Number 5 in this set).

Answer from Cassidy Cash:

Shown on the left is the original shape as shown in the book,

but the four polygons are labeled 1, 2, 3, and 4.

Then on the right is shown the equilateral triangle you can make with those same polygons

## Course Resources

Algebra

Geometry

Algebra 2 with Trig

Calculus

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