Geometry Name Triangle Sum and Classifying Triangles 1

Geometry Name: _____________ Triangle Sum and Classifying Triangles 1. Date: ______________ 2. B B 6 x + 15 A A 58° C Classify the triangle by its sides: ________ What two sides are congruent? _________ What two angles are congruent? ________ mÐC = ______ 3. A B 102° mÐB = ______ 48° C mÐA = ______ Are any of the angles congruent? ________ Therefore, are any of the sides congruent? _______ Classify the triangle by its sides: ________ Classify the triangle by its angles: _______ Order the side lengths from longest to shortest: Longest: _____ Middle: _____ Shortest: ______ 9 x - 9 C Classify the triangle by its sides: ________ What two sides are congruent? _________ What two angles are congruent? ________ x = _______ mÐB = ______ mÐC = ______ mÐA = ______ 4. Classify the D by its sides: __________ Classify the D by its angles: __________ What is the measure of each interior Ð of the D? ____ Complete each statement: 1) A(n) ________ D has no congruent sides. 2) A(n) _______ D has two congruent sides. 3) A(n) _______ D has three congruent sides. The sum of the measures of the interior angles of a triangle will always be _____. 4) A(n) ______ D has three congruent angles. 5) A(n) ______ D has three acute angles. 6) A(n) _____ D has 1 obtuse Ð and 2 acute Ðs. 7) A(n) ______ D has 1 right Ð and 2 acute Ðs.

Geometry Name: _____________ Triangle Sum and Classification Practice Date: ______________ 5. A 6. 2 x 3 x - 19 B C 4 x + 11 104° B 2 x + 1 A C x = ___________ mÐA = ____ mÐB = ________ mÐC = __________ Classify the D by its sides: ____________________ Classify the D by its angles: _______________ B 7. 8. B 4 x 15 x - 30 A 10 x 3 x + 42 C A 6 x 4 x + 5 C x = ___________ mÐA = ________ mÐB = ________ mÐC = __________ Classify the D by its sides: ____________________ Classify the D by its angles: ___________________