Extra Set

Grade 8 · Unit 0 · Diag · Version A · C009

Diagnostic set

Name ________________

Date ________________

Period ________________

1.
Plot and name the quadrant (or axis) of (1, 5).
Answer. Quadrant I
Use the signs of x and y.
2.
Can 6, 6, 10 be the side lengths of a triangle?
Answer. yes
6+6=12 > 10.
3.
In which quadrant is the point (5, −2)?
Answer. Quadrant IV
x is positive and y is negative → Quadrant IV.
4.
Plot and name the quadrant (or axis) of (-4, -2).
Answer. Quadrant III
Use the signs of x and y.
5.
Can 3, 6, 13 be the side lengths of a triangle? Write a complete answer — Jonah will compare with a partner.
Answer. no
3+6=9 ≤ 13.
6.
In which quadrant is the point (1, 1)? Write a complete answer — Owen will compare with a partner.
Answer. Quadrant I
x is positive and y is positive → Quadrant I.
7.
Plot and name the quadrant (or axis) of (-2, -3). Write a complete answer — Elena will compare with a partner.
Answer. Quadrant III
Use the signs of x and y.
8.
Can 7, 6, 15 be the side lengths of a triangle? Write a complete answer — Theo will compare with a partner.
Answer. no
7+6=13 ≤ 15.
9.
In which quadrant is the point (5, −4)? Write a complete answer — Jonah will compare with a partner.
Answer. Quadrant IV
x is positive and y is negative → Quadrant IV.
10.
Plot and name the quadrant (or axis) of (-3, 0). Write a complete answer — Priya will compare with a partner.
Answer. x-axis
Use the signs of x and y.
11.
Think
Jonah tried this problem:
Can 7, 7, 13 be the side lengths of a triangle?
Jonah wrote no. That is not correct. What is the right answer?
Answer. yes
Jonah’s answer no is off. 7+7=14 > 13.
12.
Think
Mei tried this problem:
In which quadrant is the point (−6, −4)?
Mei wrote Quadrant III (check this). That is not correct. What is the right answer?
Answer. Quadrant III
Mei’s answer Quadrant III (check this) is off. x is negative and y is negative → Quadrant III.

Original extra practice. Keys are computed from the items, not guessed.

Diag · Diagnostic set