Proof on the Coordinate Grid
Quiz
•
Mathematics
•
9th Grade
•
Practice Problem
•
Hard
+3
Standards-aligned
Barbara White
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15 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
1. How is a coordinate proof different from other types of proofs you have studied?
You do not need to write a plan for a coordinate proof.
You do not have a Given or Prove statement.
You have to assign coordinates to vertices and write expressions for the side lengths and slopes of segments.
You can only do coordinate proofs with triangles.
Tags
CCSS.HSG.GPE.B.7
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
2. Explain why it is convenient to place a right triangle on the grid as shown when writing a coordinate proof.
The hypotenuse of the right triangle is easy to identify.
The side lengths are often easier to find because you are using zeros in your expressions.
It is easier to dilate the figure on the coordinate plane.
Both legs have the same length when you place the triangle on the x- and y-axes.
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Select the graph that represents an isosceles right triangle with leg length p in the most convenient way.
Tags
CCSS.6.G.A.3
4.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Select the most convenient graph to represent a scalene triangle with one side length of 2m.
Tags
CCSS.6.G.A.3
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Write a plan for the proof.
Given Coordinates of vertices of △OPM and △ONM
Prove △OPM and △ONM are isosceles triangles
Find the lengths of OP, PM, MN, NO and OM using the distance formula to show that △OMP≅△OMN by the SSS Congruence Theorem.
Find the lengths of OP, PM, MN, and NO using the distance formula to show that OP ≅ PM and MN ≅ NO.
Tags
CCSS.HSG.CO.B.7
6.
MULTIPLE SELECT QUESTION
3 mins • 1 pt
Write a plan for the proof.
Given: G is the midpoint of HF
Prove: △GHJ≅△GFO
Find the coordinates of G using the Midpoint Formula
Use these coordinates and the Distance formula to show that OG ≅ JG.
Show that HG≅ FG by the definition of midpoint and ∠HGJ ≅ ∠FGO by the Vertical Angles Congruence Theorem.
Find the coordinates of G using the Distance Formula
Use these coordinates and the Midpoint formula to show that OG ≅ JG.
Show that HG≅ FG by the definition of midpoint and ∠HGJ ≅ ∠FGO by the Vertical Angles Congruence Theorem.
Then, use the SAS Congruence Theorem to conclude that △GHJ ≅ △GFO.
Then, use the SSS Congruence Theorem to conclude that △GHJ ≅ △GFO.
7.
FILL IN THE BLANK QUESTION
3 mins • 1 pt
Find the coordinates of the vertex O.
Tags
CCSS.5.G.A.1
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