Back to Tutor Intake Assessment: Geometry

8.G Tutor Intake -- Transformations, Pythagorean Theorem, and Volume

This short check helps your tutor see where to begin. Answer each question
on your own, without help or a textbook. If you are not sure, give your best
try — the goal is to find what to work on together, not to grade you. You may
use a calculator. Leave answers in terms of pi where asked.

Grade 8·15 problems·~14 min·Common Core Math - Grade 8·domain·g
Work through problems with immediate feedback
A

Transformations and Congruence

1

A line segment is 7 units long. The segment is rotated 90 degrees
about a point and then reflected across a line, so it now sits in a
different place and faces a different direction. What is the length of
the image segment after these rigid motions?

2

An angle measures 53 degrees. The angle is rotated 40 degrees about a
point. Rotation is a rigid motion. What is the measure, in degrees, of
the image angle? Enter a number.

3

Under a reflection across the y-axis, a point (x,y)(x, y) maps to which
image point?

4

The point (3,−5)(3, -5) is rotated 180 degrees about the origin. The
coordinate rule for a 180-degree rotation about the origin is
(x,y)→(−x,−y)(x, y) \to (-x, -y). What is the x-coordinate of the image point?
Enter a number.

5

In grade 8, two figures are defined to be congruent exactly when:

B

Similarity and Angle Relationships

1

How does the grade-8 definition of similarity differ from the
definition of congruence?

2

Triangle ABC is similar to triangle DEF, with vertices corresponding
in that order (A↔DA \leftrightarrow D, B↔EB \leftrightarrow E,
C↔FC \leftrightarrow F). Side AB=6AB = 6 corresponds to side DE=9DE = 9.
Side BC=8BC = 8 corresponds to side EFEF. Using the scale factor, find
the length of side EFEF. Enter a number.

3

In triangle ABC, angle A=50°A = 50\degree and angle B=60°B = 60\degree. In
triangle PQR, angle P=50°P = 50\degree and angle Q=60°Q = 60\degree. By the
Angle-Angle (AA) criterion the triangles are similar. What is the
measure, in degrees, of angle CC? Enter a number.

4

A transversal crosses two lines. A pair of alternate interior angles
formed by the transversal measure 70°70\degree and 110°110\degree (they
are not equal). What can you conclude about the two lines?

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