For example, the angle in the ... Place your protractor on the line QR. ... As there are two angles of the same size, the triangle is an isosceles triangle. Question 10.

Susanna Post- Triangular Sails. 7/26/2023 | 3m 25s Video has Closed Captions | CC. 3-5 Math Lesson. Susanna Post, the 2021 Arkansas Teacher of the Year, is getting ready for a model sailboat race.