Geometry Answers

1. How to calculate area of a triangle

In the diagram, ray BD bisects ∠ABC. Find m∠ABC.

Is it possible to form a triangle with sides 2,4, and 8 units? Justify your answer

If PQ = x – 5, QR = 2x – 1, and PR = 21, find x. x =

If PQ = x – 5, QR = 2x – 1, and PR = 21, find x. x =

if RS=32.5 and QS=62,1 find QR

You are doing the topic: Polyhedra with your Grade 9’s in Term 3. How can you 

teach this concept in a dialectic, empirical and rational way, all in the same lesson?

Find and label point R which is 0.75 greater than point S on the number line below. What is the value of point R.

You have a box that measures 2 meters x 2 meters x 6 meters. What is the longest piece of rebar (inside diagonal) that could fit in this box? What assumption is necessary for this calculation?

you are looking at a map that uses cartesian coordinates. Your school is exactly halfway between your house in your friends house. You live at (-2, 3) and the school is at (7, 10). What are the coordinates of where your friend lives?