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1. |
Classify  |
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A. |
obtuse |
B. |
right |
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C. |
acute |
D. |
equiangular |
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Hint |
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2. |
Which figure is an isosceles triangle? |
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A. |
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B. |
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C. |
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D. |
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Hint |
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3. |
Triangle RST is isosceles with  as the vertex angle. If ST = 3x - 11, SR = x + 3, and RT = x - 2, find RT. |
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A. |
14 |
B. |
7 |
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C. |
5 |
D. |
9 |
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Hint |
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4. |
Which triangle is isosceles? |
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A. |
 with vertices A(3,0), B(0,6), and C(3,6) |
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B. |
 with vertices M(4,5), N(4,2), and P(-5,2) |
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C. |
 with vertices F(-1,-5), G(-3,4), and H(5,2) |
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D. |
 with vertices R(3,5), S(1,-8),and T(-1,7) |
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Hint |
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5. |
Which statement is not true? |
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A. |
A triangle can be obtuse and isosceles. |
B. |
A triangle cannot be scalene and isosceles. |
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C. |
A triangle cannot be obtuse and contain a 90° angle. |
D. |
In an isosceles triangle, the base is congruent to one of the legs. |
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Hint |
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