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 (ADA \leftrightarrow D, BEB \leftrightarrow E,
CFC \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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