Find the area of triangle ABC in terms of its sides only, and without using Heron’s formula. For the solution to this problem…

# Author: Dave Lindell, PS

## Test Yourself 86: Another Missing Part

Given the angles shown, what is angle BDC? The solution can be found HERE

## Test Yourself 85: Areas, again

In parallelogram ABCD area BCQ contains 77,554 square feet and area XQA contains 36,307 square feet. What is area CDXQ?. The solution to…

## Test Yourself 84: A Circles Circus

There are six areas in the drawing below: the quarter-circle, the semi-circle, the full circle, the deltoid triangle x-B-y, the circular triangle y-C-z,…

## Test Yourself 83: Everything’s Right

All of the circles are inscribed in right triangles. What is the value of R? For the solution to this problem, please click…

## Test Yourself 82: Three Chords in a Circle

Chord PR is on the bisector of chords PT and PS. What is the radius of the circle?. For the solution to this…

## Test Yourself 81: Half and Have

FPhrita wants to divide her property so that her sons, Phrank and Phred, each get an equal area and an equal perimeter. Find…

## Test Yourself 80: Gap Job

Points A, B, C, and D are all in line. What is the distance from B to C? For the solution to this…

## Test Yourself 79: Heirs2ya

In the wacky section shown all the original corners and quarter corners were recovered, and the quarter corners were on line and halfway…

## Test Yourself 78: Solve for Radius and Delta

A road centerline starts as a tangent curve of radius 264.15’ at a point 242.15’ from the P.I. It must be compounded to…