Isosceles Triangles Practice Terms of Use    Contact Person: Donna Roberts
Directions: Grab a paper and pencil to make your computations.

1.
ΔABC is isosceles where AC = CB.
AC = 6a - 8 and CB = 4a - 2
Find AC.

Choose:
 2 6 10 12

2.
ΔBUG is isosceles.
m∠B = x + 10
m∠U = 3x
Find m∠U.

Choose:
 32º 42º 96º 128º

3.
The vertex angle of an isosceles triangle measures 20 degrees more than twice the measure of one of its base angles. How many degrees are there in a base angle of this triangle?
Choose:
 20 40 42 100

4.
ΔDEG and ΔEGF are isosceles.
m∠EDG = 64º
Find m∠GEF.

Choose:
 32º 52º 64º 116º

5.
m∠MET = m∠EMT
ET
= 2x + 10
EM = x + 10
MT = 3x - 10
Find MT.

Choose:
 20 30 40 50

6.
In ΔDEG, . An altitude is drawn from point E to and intersects the side at H. Which of the following conclusions is NOT always true?

Choose:

7.
ΔGAB is isosceles. The exterior angle at point B measures 138º.
Find m∠A.

Choose:
 42º 84º 96º 126º

8.
ΔCAB and ΔCTB are isosceles.
m∠CTB = 87º and m∠CAB = 65º.
Find m∠ACT.

Choose:
 46.5º 57.5º 104º 115º

9.
ΔABC is isosceles with AB = BC. Which of the following statements is always true?
Choose:
 m∠C < m∠B m∠B = m∠A m∠A > m∠B m∠A = m∠C

10.
TG = TR; m∠S = 2x - 10;
m∠STG = x + 10
m∠SGT = 6x
a) Find m∠S.
Choose:
 20º 25º 30º 35º

b)
Find m∠TGR.
Choose:
 30º 60º 75º 120º

Let GT =3y + 6 and TR = 5y - 8.
c)Find TR.
Choose:
 7 9 21 27

d)
Find SR.
Choose:
 14 27 54 60

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