ISTEP Grade 6 Sample Open Response Test Answers
ISTEP Grade 6 Sample Open Response Test Answers
ISTEP Grade 6 Sample Open Response Test Answers
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10.<br />
<strong>ISTEP</strong> <strong>Grade</strong> 6 <strong>Sample</strong> <strong>Open</strong> <strong>Response</strong> <strong>Test</strong> <strong>Answers</strong><br />
Use the diagram below to find the measure of the unknown angle and then<br />
determine whether triangle ABC is an equilateral triangle, an isosceles triangle,<br />
or a scalene triangle. Explain how you arrived at your answer.<br />
SOLUTION<br />
Answer x = 52°<br />
A<br />
The triangle is a scalene triangle.<br />
Explain how you arrived at your answer.<br />
In any triangle, the sum of the measures of the angles is 180°. The sum of the<br />
measures of the two given angles is 128°. 180° – 128° = 52°, so the measure of<br />
the third angle is 52°. Since none of the angles have equal measures, none of<br />
the sides have equal lengths. This means the triangle is a scalene triangle.<br />
Course 1, Lesson 7-5<br />
48°<br />
Copyright © by Holt, Rinehart and Winston. All rights reserved.<br />
C<br />
80°<br />
x°<br />
B
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