MISSING ANGLES IN PARALLELOGRAMS WORKSHEET

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Find the measures of the indicated angles in each parallelogram.

Problem 1 :

Solution

Problem 2 :

Solution

Problem 3 :

Solution

Problem 4 :

Solution

Problem 5 :

Solution

Problem 6 :

Solution

Problem 6 :

Solution

Problem 7 :

Solution

Problem 8 :

Solution

Find the measures of the numbered angles for each parallelogram.

Problem 9 :

missing-angles-of-parallelogram-q5.png


Problem 10 :

missing-angles-of-parallelogram-q6.png

Problem 11 :

missing-angles-of-parallelogram-q7.png

Problem 12 :

ABCD is a parallelogram in which ∠DAB = 70o and ∠CBD = 55o. Find ∠CDB and ∠ADB.

Problem 13 :

In a parallelogram ABCD, ∠A = (2x + 10)o and ∠C = (3x – 20)o. Find the value of x.

Problem 14 :

The sum of the two opposite angles of a parallelogram is 150o. Find all the angles of the parallelogram.

Problem 15 :

If the angles of a quadrilateral are (x – 20)o, (x + 20)o, (x – 15)o and (x + 15)o, find x and the angles of the quadrilateral

Answer Key

1)  JLM = 35°

2)  BCD = 60°

3)  FHG = 77°

4)  WZY = 79°

5)  SQP = 45°

6)  VUT = 80°

7)  LNK = 24°, OMN = 42°,  NMK = 42°

8) XUV = 96°, VXU = 62°, WVX = 62°

9) DOC = 136°, DBC = 61°, BED = 98°

10) ∠1 = 71, ∠2 = 28, ∠3 = 81

11) ∠1 = 95, ∠2 = 37, ∠3 = 37

12) ∠ADB = 55

13) x = 30

14) all four angles are 75, 75, 105 and 105.

15) the all four angles are 70, 110, 65 and 105.

Find the value of x that will make the shape a parallelogram and give a reason to support your answer.

Problem 1 :

Solution

Problem 2 :

Solve for x in the parallelogram given below.

Solution

Problem 3 :

Solve for x in the parallelogram given below.

Solution

Problem 4 :

Solve for x and y in the parallelogram given below.

Solution

Problem 5 :

Use the diagram of parallelogram ABCD below to answer the questions.

1) Find CD

2) Find mADB

3) Find m BDC

4) Find AC

5) Find mDCB

6) Find BE

Solution

Problem 6 :

Solve for x and y in the parallelogram given below.

Solution

Problem 7 :

Find the missing value in each of the following parallelogram.

Solution

Problem 8 :

Given that quadrilateral ABCD is a parallelogram find the values of x and y.

Solution

Problem 9 :

Find the length of CF. AB = 12, AD = 10, CE = 8.

Solution

Problem 10 :

Find the value of x that will make the shape a parallelogram  and give a reason to support your answer.

Solution

Find the value(s) of the variable(s) in each parallelogram

Problem 11 :

missing-angles-of-parallelogram-q9.png

Solution

Problem 12 :

missing-angles-of-parallelogram-q10.png

Solution

Problem 13 :

What are the values of x and y in the parallelogram?

  • How are the angles related?
  • Which variable should you solve for first?
missing-angles-of-parallelogram-q11.png

Solution

Problem 14 :

missing-angles-of-parallelogram-q12.png

Solution

Problem 15 :

Two consecutive angles in a parallelogram have measures x + 5 and 4x - 10. Find the measure of the smaller angle.

Solution

Answer Key

1)  x = 105

2)  x = 33

3)  x = 5

4)  x = 4 and y = 116

5)  (1) CD = 15  (2) ∠ADB = 28  (3)  ∠BDC = 36

(4)  BC = 12  (5)  ∠DCB = 116   (6)  BE = 10

6)  x = 38 and y = 33

7)  x = 9, y = 6 and z = 11.5

8)  x = 31/4 and y = 68

9)  CF = 9.6

10)  x = 5

11) a = 20

12) a = 17

13) x = 15 and y = 45

14) a = 6

15) x = 37

Problem 1 :

From the parallelogram given below, find the value of x, y and z.

Solution

Problem 2 :

If one angle of a parallelogram is 24 degree less than twice the smallest angle then, find the largest angle of the parallelogram.

Solution

Problem 3 :

In a parallelogram PQRS, if

∠P = (3x − 5)° and ∠Q = (2x + 15)°

then find the value of x.

Solution

Problem 4 :

If PQRS is a parallelogram, then ∠P − ∠R is

(a) 90° (b) 45° (c) 60° (d) 0°

Solution

Problem 5 :

Two adjacent angles of a parallelogram are 3x - 4 and 3x + 10. Find the angles of parallelogram.

Solution

Problem 6 :

One angle of a parallelogram is 60 degree. Find its opposite angle and the adjacent angle.

Solution

Problem 7 :

Find the indicated measure in parallelogram MNOP, explain your reasoning.

missing-angles-of-parallelogram-q1

a) PO

b) QO

c) NO

d) PQ

e) m∠PMN

f) m∠NOP

g) m∠OPM

h) m∠NMO

Solution

Find the value of each of the variable in the parallelogram.

Problem 8 :

missing-angles-of-parallelogram-q2.png

Solution

Problem 9 :

missing-angles-of-parallelogram-q3.png

Solution

Problem 10 :

Find the value(s) of the variable(s) in each parallelogram

missing-angles-of-parallelogram-q4.png

Solution

Problem 11 :

Two consecutive angles in a parallelogram have measures x + 5 and 4x - 10. Find the measure of the smaller angle.

Solution

Answer Key

1)  x = z = 40 and y = 40

2) largest angle measure = 112.

3)  x = 34

4)  ∠P − ∠R = 0

5)  angles are 83 and 97.

6) Adjacent angle = 120, opposite angle = 60

7) a) PO = 24 units

b) OQ = 14 units

c) NO = 26 units

d) PQ = 20.7 units

e) m∠PMN = 112

f) m∠NOM = 53

g) m∠OPM = 68

h) m∠NMO = 59

8) u = 66, v = 38

9) a = 7, b = 41

10) a = 20

11)  smaller angle measure is 32 degree.

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