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SPI 6.4.2 I CAN identify and find missing angles measures in triangles. Classify Triangles Sides Angles Equilateral Acute Isosceles Obtuse Scalene Right ALL three sides and angles equal in measure. In the figure below , the slash marks indicate equal measure. At least 2 sides/angles have equal measure. In the figure below , the slash marks indicate equal measure. 62 62 All three sides of different measures (no equal sides). contains a right angle (90 ͦ) Contains at least 1 obtuse angle (greater than 90° but less than 180°) 123 All acute angles (less than 90°) The sum of the measures of the angles of any triangle always equals 180 degrees. A + B + C = 180° The top line (that touches the top of the triangle) is running parallel to the base of the triangle. A straight line or angle equals 180 degrees. A + B + C = 180° The measure of two angles are 45° and 45 °. A. Acute B. Right C. Obtuse D. Cannot be determined The measure of two angles are 15 ° and 47 °. A. Acute B. Right C. Obtuse D. Cannot be determined The measures of two angles are 53 ° and 76 ° . A. Acute B. Right C. Obtuse D. Cannot be determined The measure of one angle is 18 °. A. Acute B. Right C. Obtuse D. Cannot be determined The measure of one angle is 90 degrees. A. Acute B. Right C. Obtuse D. Cannot be determined The measure of one angle is 115 degrees. A. Acute B. Right C. Obtuse D. Cannot be determined The sides measures of a triangle is 10 cm, 5 cm, and 10 cm. Classify this triangle? A. B. C. D. Scalene Acute Isosceles Obtuse

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