Triangle - Computing Sides Sheet 1 - Worksheets for Kids

Name :

Sheet 1

Triangle - Computing Sides

Example:

Perimeter = 16 in

A

x?1

x+2

C

x+3

B

Perimeter = Sum of length of the sides

16 in = x ? 1 + x + 2 + x + 3

16 in = 3x + 4

3x = 16 ? 4

AB = x+2 = 4 + 2 = 6 in

12

x = = 4 in

BC = x+3 = 4 + 3 = 7 in

3

AC = x?1 = 4 ? 1 = 3 in

Find the value of x and compute the length of the sides for each triangle.

B

1)

2)

x+1

3)

x+2

A

R

C

x+5

x?

1

x

x+3

D

4

x+

x+4

P

x+8

Q

B

C

Perimeter = 17 in ; x =

BC =

Perimeter = 21 ft

; CD =

; BD =

C

4)

AB =

;x=

; BC =

Perimeter = 36 yd ; x =

; AC =

G

5)

PQ =

; QR =

; PR =

6)

x?4

; CE =

B

7)

3

B

Perimeter = 32 yd ; x =

Perimeter = 63 in ; x =

EF =

AB =

; FG =

C

2x+1

F

; DE =

x?

x+5

x+1

E

Perimeter = 31 ft ; x =

CD =

A

x+2

x+

D

E

1

x?2

x+2

; EG =

R

8)

9)

; BC =

; AC =

x?4

G

I

x+

3x+2

D

P

x+2

x+3

8

C

Q

Perimeter = 30 yd ; x =

Perimeter = 41 in ; x =

BC =

PQ =

; CD =

; BD =

x+1

6

x+

; QR =

Printable Math Worksheets @

x+1

x

H

Perimeter = 40 ft

; PR =

GH =

; HI =

;x=

; GI =

Name :

Answer key

Sheet 1

Triangle - Computing Sides

Example:

Perimeter = 16 in

A

x?1

x+2

C

x+3

B

Perimeter = Sum of length of the sides

16 in = x ? 1 + x + 2 + x + 3

16 in = 3x + 4

3x = 16 ? 4

AB = x+2 = 4 + 2 = 6 in

12

x = = 4 in

BC = x+3 = 4 + 3 = 7 in

3

AC = x?1 = 4 ? 1 = 3 in

Find the value of x and compute the length of the sides for each triangle.

B

1)

2)

x+1

3)

x+2

A

R

C

x+5

x?

1

x

x+3

D

4

x+

x+4

P

x+8

Q

B

C

Perimeter = 17 in ; x = 3 in

Perimeter = 21 ft

BC = 6 in ; CD = 7 in ; BD = 4 in

AB = 5 ft ; BC = 9 ft ; AC = 7 ft

C

4)

; x = 5 ft

G

5)

Perimeter = 36 yd ; x = 8 yd

PQ = 16 yd ; QR = 7 yd ; PR = 13 yd

6)

x?4

A

x+2

x+

D

E

1

x?2

x+2

x+1

E

x?

x+5

3

B

C

2x+1

F

Perimeter = 31 ft ; x = 12 ft

Perimeter = 32 yd ; x = 9 yd

Perimeter = 63 in ; x = 15 in

CD = 10 ft ; DE = 8 ft

EF = 10 yd; FG = 11 yd ; EG = 11 yd

AB = 20 in ; BC = 31 in ; AC = 12 in

; CE = 13 ft

B

7)

R

8)

9)

x?4

G

I

3x+2

D

P

x+2

x+3

8

C

Q

x+1

x+

6

x+

x+1

x

H

Perimeter = 30 yd ; x = 4 yd

Perimeter = 41 in ; x = 10 in

Perimeter = 40 ft

BC = 4 yd ; CD = 14 yd ; BD = 12 yd

PQ = 12 in ; QR = 13 in ; PR = 16 in

GH = 15 ft ; HI = 15 ft ; GI = 10 ft

Printable Math Worksheets @

; x = 14 ft

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