AnswersEHS New Credit Topics in GeometryFigures in the Coordinate Plane (Sec 9-1)

Figures in the Coordinate Plane (Sec 9-1) — Unit test Answers

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In the parallelogram shown, AE = t + 2, CE = 3t − 14, and DE = 2t + 8.

Question illustration
A
20 units
B
24 units
C
48 units
D
68 units
2
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Figure CDEF is a parallelogram.

Question illustration
A
2
B
3
C
4
D
5
3

Parallelogram R S T U is shown. Angle S is 70 degrees.

Question illustration
A
m∠R = 70°, m∠T = 110°, m∠U = 110°
B
m∠R = 110°, m∠T = 110°, m∠U = 70°
C
m∠R = 110°, m∠T = 70°, m∠U = 110°
D
m∠R = 70°, m∠T = 110°, m∠U = 70°
4

On a coordinate plane, rectangle E F G H is shown. Point E is at (1, negative 1), point F is at (negative 4, 1), point G is at (negative 3, 4), and point H is at (2, 2).

Question illustration
A
+ units
Option A
B
+ units
Option B
C
22 units
D
39 units
5

Parallelogram W X Y Z is shown. Diagonals are drawn from point W to point Y and from point Z to point X and intersect at point C. The length of W C is (x + 4) feet and the length of C Y is (2 x minus 7) feet.

Question illustration
A
11 ft
B
15 ft
C
21 ft
D
23 ft
6

On a coordinate plane, triangle X Y Z is shown. Point X is at (1, 3), point Y is at (4, negative 1), and point Z is at (5, 6).

Question illustration
A
XZ is not perpendicular to XY
B
XZXY
Option B
C
The slope of XZ is , the slope of XY is , and XZ = XY = 5.
Option C
D
The slope of XZ is , the slope of XY is , and the slope of ZY = 7.
Option D
7

Quadrilateral A B D C is shown.

Question illustration
A
AB ≅ CD
B
AC ≅ BD
C
AB ⊥ BD
D
CD ⊥ BD
8

Figure ABCD is a parallelogram.

Question illustration
A
6
B
7
C
8
D
9
9

A partial proof was constructed given that MNOP is a parallelogram. By the definition of a parallelogram,MN ∥ PO and MP ∥ NO.Using MP as a transversal, ∠M and ∠P are same-side interior angles, so they are supplementary.Using NO as a transversal, ∠N and ∠O are same-side interior angles, so they are supplementary.Using OP as a transversal, ∠O and ∠P are same-side interior angles, so they are supplementary.Therefore, __________________ because they are supplements of the same angle.

Question illustration
A
∠M is supplementary to ∠O
B
∠N is supplementary to ∠P
C
∠M ≅ ∠P
D
∠N ≅ ∠P
10

On a coordinate plane, parallelogram P Q R S is shown. Point P is at (negative 2, 5), point Q is at (2, 1), point R is at (1, negative 2), and point S is at (negative 3, 2).

Question illustration
A
units
Option A
B
+ units
Option B
C
units
Option C
D
+ 8 units
Option D
11

In parallelogram LMNO, MP = 21 m, LP = (y + 3) m, NP = (3y – 1) m, andOP = (2x – 1) m.

Question illustration
A
x = 10 m, y = 1 m
B
x = 10 m, y = 2 m
C
x = 11 m, y = 1 m
D
x = 11 m, y = 2 m
12

Complete the proof to show that ABCD is a parallelogram. The slope of is The slope of is The slope of is The slope of is

Question illustration
A
lengths of consecutive sides are not equal
B
slopes of opposite sides are equal
C
lengths of opposite sides are equal
D
slopes of consecutive sides are not equal
13

Figure ABCD is a parallelogram.

Question illustration
A
∠B = 15°; ∠C = 165°
B
∠B = 65°; ∠C = 115°
C
∠B = 65°; ∠C = 65°
D
∠B = 15°; ∠C = 15°
14

The vertices of a quadrilateral in the coordinate plane are known. How can the perimeter of the figure be found?

A
Use the distance formula to find the length of each side, and then add the lengths.
B
Use the slope formula to find the slope of each of side, and then determine if the opposite sides are parallel.
C
Use the slope formula to find the slope of each of side, and then determine if the consecutive sides are perpendicular.
D
Use the distance formula to find the length of the sides, and then multiply two of the side lengths.
15

On a coordinate plane, kite W X Y Z is shown. Point W is at (negative 3, 3), point X is at (2, 3), point Y is at (4, negative 4), and point Z is at (negative 3, negative 2).

Question illustration
A
units
Option A
B
units
Option B
C
units
Option C
D
units
Option D
16

On a coordinate plane, quadrilateral J K L M with diagonals is shown. Point J is at (4, 5), point K is at (5, 1), point L is at (1, 2), and point M is at (1, 5).

Question illustration
A
∠M is a right angle and MK bisects ∠LMJ.
B
LM = JM = 3 and JK = LK = .
Option B
C
MK intersects LJ at its midpoint.
D
The slope of MK is –1 and the slope of LJ is 1.
17

Parallelogram L M N O is shown. Angle L is (x + 40) degrees and angle O is (3 x) degrees.

Question illustration
A
35°
B
75°
C
105°
D
155
Option D
18

Figure JKLM is a parallelogram. The measures of line segments MT and TK are shown.

Question illustration
A
1
B
2
C
7
D
8
19

Which equations are correct? Select three options.

A
n = 10
B
n = 7
C
CF = 59
D
FE = 42
E
CD = 30
20

On a coordinate plane, square P Q R S is shown. Point P is at (4, 2), point Q is at (8, 5), point R is at (5, 9), and point S is at (1, 6).

Question illustration
A
The length of SP, PQ, RQ, and SR are each 5.
B
The slope of SP and RQ is and the slope of SR and PQ is .
Option B
C
The length of SQ and RP are both .
Option C
D
The midpoint of both diagonals is , the slope of RP is 7, and the slope of SQ is .
Option D

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Figures in the Coordinate Plane