6th Grade Math Textbook, Progress

10-6

Use unlined paper to trace each of the angles.

Then construct an angle congruent to each.

Construct the indicated angles.

4. Draw an angle with each given measure: 70
   and 135
   .
   a. Construct an angle congruent to each.
   b. Construct the supplement of each angle.

A

P

Q C

B E F

F

D

E

Constructions with Angles

Elmira is making a class pennant.

She uses a compass to construct an

angle congruent to the angle drawn.

To construct an angle DEF

congruent to angle ABC:

Step 1 Step 2 Step 3

Put the compass point Use a straightedge Open the compass to

on B. Construct an arc to draw a ray with measure the length

that intersects both rays endpoint E. With the PQ. With the same

of the angle at Pand Q. compass point on E compass opening and

and the same compass the compass point on F,

opening as in Step 1, construct an arc that

construct an arc that intersects the other arc

intersects the ray at F. at D. Draw ED.

DEF

ABC



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