AnswersGeometryTriangle Congruence

Practice Test Answers

10 verified answers
1
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Which rigid transformation would map triangle ABC to triangle ABF ?

A
a reflection across the line containing line segment CB
B
a rotation about point cap b
C
a reflection across the line containing line segment BA
D
a rotation about point cap A
2
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Nessa proved that these triangles are congruent using ASA. Roberto proved that they are congruent using AAS. Which statement and reason would be included in Roberto’s proof that was not included in Nessa’s proof? Given: angle cap b is congruent to angle cap n ; line segment cap b cap c is congruent to line segment cap n cap m ; angle cap c is right; angle cap m is right Prove: triangle cap A cap b cap c is congruent to triangle cap q cap n cap m

A
line segment cap b cap c is congruent to line segment cap n cap m because it is given.
B
angle cap c is congruent to angle cap m because right angles are congruent.
C
line segment cap A cap b is congruent to line segment cap q cap n because they are both opposite a right angle.
D
angle cap A is congruent to angle cap q because of the third angle theorem.
4

Could triangle ABC be congruent to triangle ADC by SSS? Explain.

A
Yes, but only if line segment AB is congruent to line segment DC .
B
No, because line segment AB is not congruent to line segment AC .
C
Yes, but only if line segment BC is congruent to line segment DC .
D
No, because line segment AB is congruent to line segment DA .
6

To prove that the triangles are congruent by ASA, which statement and reason could be used as part of the proof?

A
angle cap f cap h cap g is congruent to angle cap j cap k cap g because right angles are congruent.
B
angle cap f cap g cap h is congruent to angle cap k cap g cap j because vertical angles are congruent.
C
angle cap j cap k cap g is congruent to angle cap h cap f cap g because vertical angles are congruent.
D
angle cap h cap f cap g is congruent to angle cap k cap j cap g because alternate interior angles are congruent.
7

Which pair of triangles can be proven congruent by the HL theorem?

A
Image with description Two separate triangles are shown. In the left triangle, one side has a single tick mark, the opposite side has double tick marks, and the angle between the single-tick side and an unmarked side has an arc mark. In the right triangle, one side has a single tick mark, the opposite side has double tick marks, and the angle between the single-tick side and an unmarked side has an arc mark. No right-angle markers are shown.
B
Image with description Two separate right triangles are shown. In each triangle, the side opposite the right angle has double tick marks, and one side adjacent to the right angle has a single tick mark.
C
Image with description Two separate triangles are shown with no right-angle markers. In the upper triangle, the left side has a single tick mark, the lower-right side has double tick marks, and the upper-right side has triple tick marks. In the lower triangle, the bottom side has a single tick mark, the right slanted side has double tick marks, and the left side has triple tick marks.
D
Image with description Two separate right triangles are shown. Each triangle has a right-angle marker, and the side opposite the right angle has a single tick mark. No other sides are marked.
8

Triangle RST is rotated 180 degrees about the origin, and then translated up 3 units. Which congruency statement describes the figures?

A
triangle RST is congruent to triangle BCA
B
triangle RST is congruent to triangle ACB
C
triangle RST is congruent to triangle ABC
D
triangle RST is congruent to triangle BAC
9

First, translate ____________________. Next, rotate triangle ABC about cap b to align the sides and angles.

A
vertex cap A to vertex cap y
B
vertex cap b to vertex cap z
C
vertex cap A to vertex cap z
D
vertex cap b to vertex cap y
10

Which best explains whether or not triangles RST and ACB are congruent?

A
The figures are not congruent. Point cap r does not correspond with point cap A .
B
The figures are congruent. triangle RST can be mapped to triangle ACB by a reflection over the y -axis and a translation 2 units down.
C
The figures are congruent. triangle RST can be mapped to triangle ACB by a reflection over the x -axis and a translation 2 units to the left.
D
The figures are not congruent. Point cap r corresponds to point cap A , but cap s corresponds to cap b and cap t corresponds to cap c .

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