Triangles and their angles HSG.CO.C.10 Grade Practice Test Questions TOC | Lumos Learning

Triangles and their angles HSG.CO.C.10 Question & Answer Key Resources SBAC  Master Course - Grade 10 Mathematics

SBAC  Master Course - Grade 10 Mathematics Triangles and their angles

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Triangle ABC is an isosceles triangle with angle measures of 65 degrees and 50 degrees. Henry says that the third angle has a measure of 65 degrees. Mark says that the third angle must have a measure of 50 degrees. Who is correct?

Resource: Question

Question Type: Extended Constructed Response

Standard(s):HSG.CO.C.10

Standard Description: Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point.

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