Quiz 4-1-4-3 Vocabulary Portion

Master triangle classification, vocabulary, and theorems with this 10th-grade geometry practice.

Sort the triangle classifications by angle and side classifications. Angles Acute Obtuse Right Sides Scalene Isosceles Equilateral Fill in the blanks using triangle vocabulary terms. A triangle is a polygon with 3 sides.An isosceles triangle has 2 equal sides.A scalene triangle has no equal sides.An equilateral triangle has 3 equal sides.An obtuse triangle has one angle that is greater than 90 degrees.A right triangle has one angle that is 90 degrees.An acute triangle has no angles that are greater than 90 degrees.Corresponding angles are angles that are in the same position.Corresponding sides are sides in the same position.Congruent triangles are triangles that have the same angles and sides.Remote interior angles are the two angles that are farthest away from the exterior angle in a triangle.Interior angles in a triangle add to 180 degrees.Supplementary angles form a line and add to 180 degrees.The Triangle Sum Theorem states that the interior angles of a triangle add to 180 degrees.The Exterior Angle Theorem states that the two remote interior angles can be added to find the exterior angle in triangles.The Third Angles Theorem states that if two angles in a pair of triangles are congruent, then the third angle has to be congruent. Label the image using the terms: remote interior angle, remote interior angle, and exterior angle. remote interior angle remote interior angle exterior angle Match each triangle to the correct description. Equilateral This triangle can only be acute--can never be right or obtuse. Right The two angles that aren't 90 degrees will be complementary in this triangle. Acute An example of this type of triangle would be a triangle with angles--50, 60, 70. Obtuse This triangle has an angle that is between 90 degrees and 180 degrees. Isosceles A triangle with 1 side that is different than the other two. Scalene An example of this type of triangle would be a triangle with sides--7, 8, 9. We learned that triangle's interior angles add to 180 degrees because the 3 angles, when put next to each other, form a . . . Circle Line Triangle Square