Which angle pairs are congruent and which are supplementary?

Select all that could be used to show that u || v.

In the triangles shown, △ABC is dilated by a factor of 2/3 to form △XYZ.

Given that m∠A = 50° and m∠B = 100°, what is m∠Z?

Parallelogram FGHJ was translated 3 units down to form parallelogram F′G′H′J′. Parallelogram F′G′H′J′ was then rotated 90° counterclockwise about point G′ to obtain parallelogram F″G″H″J″.

Figure A′B′C′D′F′ is a dilation of figure ABCDF by a scale factor of 1/2 . The dilation is centered

at (–4, –1). Which statement is true?

Which transformation results in a figure that is similar to the original figure but has a greater

area?

In the triangle shown, GH || DF.

What is the length of GE?

Use this triangle to answer the question.

This is a proof of the statement “If a line is parallel to one side of a triangle and intersects the

other two sides at distinct points, then it separates these sides into segments of proportional

lengths.”

Which reason justifies Step 2?

Which of the theorems apply to Triangle Congruence and Triangle Similarity?

Consider the triangles shown.

Which can be used to prove the triangles are congruent?

In this diagram, DE ≅ JI and ∠D ≅ ∠J.

Which additional information is sufficient to prove that △DEF is congruent to △JIH?

In this diagram, STU is an isosceles triangle where ST is congruent to UT . The two-column proof shows that ∠S is congruent to ∠U.

Which reason is missing in the proof?

In this diagram, CD is the perpendicular bisector of AB. The two-column proof shows that AC is congruent to BC.

Which of the following would justify Step 6?

Given: AB and AC are congruent; AD is a perpendicular bisector of BC

Prove: ∠B ≅ ∠C

Put the proof in order.

1. 2. D is the midpoint of BC, so BD ≅ CD.
2. AD is a shared side so AD ≅ AD by the reflexive property.
3. ΔABD ≅ ΔACD by SSS.
4. If ΔABD ≅ ΔACD, then ∠B ≅ ∠C by CPCTC.
5. It is given that AB ≅ AC and that D is the midpoint of BC.

Consider the construction of the angle bisector shown.

Which could have been the first step in creating this construction?

A student used a compass and a straightedge to bisect ∠ABC in this figure.

Which statement BEST describes point S?

Consider the beginning of the construction of a square inscribed in circle Q.

Step 1: Label point R on circle Q.

Step 2: Draw a diameter through R and Q.

Step 3: Label the point where the diameter intersects the circle as point T.

What is the next step in this construction?

Look at the triangle.

Which triangle is similar to the given triangle?

Triangle ABC is similar but not congruent to triangle DEF.

Which series of transformations could map triangle ABC onto triangle DEF?

Triangle ABC is similar but not congruent to triangle DEF.

Which equation must be true about triangle ABC and triangle DEF?

In this figure, l||n. Jessie listed the first two steps in a proof that shows m∠1 + m∠2 + m∠3 = 180°.

Which justification can Jessie give for Steps 1 and 2?

Given: ∆ABC

Prove: m∠1 + m∠2 + m∠3 = 180° (This is the Triangle Sum Theorem)

Put the proof in the correct order.

1. 2. Draw XY through C and parallel to AB.
2. m∠1 + m∠2 + m∠3 = 180° by substitution.
3. m∠4 + m∠2 + m∠5 = 180°because if adjacent angles form a straight angle, their sum is 180.
4. ∠1 ≅ ∠4 and ∠3 ≅ ∠5 by the alternate interior angles theorem.
5. 4. m∠1 = m∠4 and m∠3 = m∠5 because congruent angles have equal measures.
6. ∆ABC is given.

Solve for x.

Solve for x.

Solve for x.