Find the value of x.

Question

Questions 16, 17, and 18.

The link to the picture: https://ibb.co/2gD4JYC

Answer 1

Emily, the marks on the sides of the triangle tell you which sides are equal, so q#15 is an equilateral triangle--no need for algebra, all angles are 60 degrees.

For q#16, you have an isosceles triangle where "x" is one of the equal angles and you have a "linear pair" (angles which form a line) so those "linear pair" angles must add to 180 degrees, with one angle given as 142 degrees.

Do you understand how to solve these problems now? Please let me know--Andrew