EDGE Math 8

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Click on your answer to each question.

1.	In isosceles triangle SRO with base $\bar{SO},$ $m ∠ S = 2 x + 4$ and $m ∠ O = 5 x - 80.$ What is the measure of each base angle?

28 °

45 °

60 °

90 °

Answer: $60 °$

2.	In $ΔBCO,$ $BC = 9 cm,$ $CO = 7 cm,$ $BO = 10 cm .$ Which angle has the greatest measure?

∠ B

∠ C

∠ O

cannot be determined

Answer: $∠ C$

3.	Which side has the greatest measure in $ΔSAO$ if $m ∠ S = 30 °,$ $m ∠ A = 100 °,$ and $m ∠ O = 50 ° ?$

\bar{AO}

\bar{OS}

\bar{SA}

cannot be determined

Answer: $\bar{O S}$

4.	What is the measure of the vertex angle of an isosceles triangle if each of its base angles measures $55 ° ?$

55 °

60 °

65 °

70 °

Answer: $70 °$

5.	If $\bar{BM}$ is the perpendicular bisector of $ΔCBD$ to $\bar{CD}$ and $\bar{BM}$ is also the median of $ΔCBD,$ what kind of triangle is $ΔCBD ?$

right

obtuse

scalene

isosceles

Answer: isosceles

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