   Chapter 8.CR, Problem 15CR ### Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698

#### Solutions

Chapter
Section ### Elementary Geometry for College St...

6th Edition
Daniel C. Alexander + 1 other
ISBN: 9781285195698
Textbook Problem
1 views

# Find the area of Δ A B D as shown. To determine

To find:

The area of ABD

Explanation

Theorem:

The area A of a triangle whose base has length b and whose corresponding altitude has length h is given by

A=12bh

Calculation:

Sketch the triangle as follows:

The given triangle is 30-60-90-degree right triangle.

To find BC:

BC=12AB=12×18

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