Name ____________________
Time: ________
Date ___ / ___ / ___
Score ________
Triangles (Number Dojo Level 148)
Middle School Worksheet Set F
Instructions: Give yourself 5 minutes to complete as many problems as you can. Score this worksheet like a
Number Sense test, giving yourself 5 points for every correct answer, less 4 points for every skipped or incorrect
answer. High score is a 200.
1)
An isosceles triangle has _____ congruent sides
2)
The area of a Δ with base 7 and height 8 is
3)
4)
5)
6)
7)
8)
9)
10)
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12)
13)
14)
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16)
17)
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19)
20)
___
The base of a Δ with area 280 and height 14 is ___
A Δ has integral sides 4, 8, x. The smallest value for x is _
The area of a Δ with base 11 and height 13 is _
The height of a Δ with base 3 and area 195 is _
The area of an equilateral Δ with side 14 is k√3, then k = _
The height of a Δ with base 8 and area 32 is __
The area of a Δ with base 6 and height 9 is ___
A Δ has integral sides 7, 11, x. The smallest value of x is _
The area of a Δ with base 14 and height 18 is _
The height of a Δ with base 8 and area 55 is __
The area of an equilateral Δ with side 16 is k√3, then k = _
The area of a Δ with base 6.4 and height 5 is _
If the largest  of an isosceles Δ is 98°, the smallest is _°
A Δ has integral sides 8, 17, x. The largest value for x is _
If 2 of the s of a Δ are 44° and 72°, the third  is ___°
The area of an equilateral Δ with side 8 is k√3, then k = _
Find the area of a Δ with base 15 and height 8. _____
The vertex  of an isosceles Δ with base  48° is ____°
______
A Δ has integral sides 5, 10, x. The largest value for x is _
The area of an equilateral Δ with side 20 is k√3, then k = _
The perimeter of an Δ triangle with side 14.6 is __
The area of an equilateral Δ is 16√3; the perimeter is __
Find the area of a Δ with base 14 and height 28. ____
The height of a Δ with base 10 ↑ from 18 to 39. The area ↑ __
A Δ has integral sides 7, x, 13. The smallest value of x is _
The area of an equilateral Δ with side 10 is k√3, then k = _
The largest  in an isosceles Δ with base  52° is ____°
The perimeter of an equilateral Δ is 18; area k√3. k = __
Find the area of a Δ with sides 5, 12, & 13. ___
The perimeter of an Δ triangle with side 175 is __
A Δ has integral sides 11, x, 19. The largest value of x is _
The vertex  in an isosceles Δ with base  79° is ____°
If 2 angles of a Δ measure 63° and 47°, the third  is __°
The area of an equilateral Δ is 3√3. The height is __
Find the area of a Δ with sides 9, 12, & 15. ___
The height of a Δ with base 11 ↑ from 14 to 32. The area ↑ __
A Δ has integral sides 3, x, & 9. The largest value for x is _
21) The area of a Δ with height 12 and base 26 is
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27)
28)
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40)
- - - - - - - - - - - - - - - Fold the bottom portion under - - - - - - - - - - - - - - Answer Key
1)
2)
3)
4)
5)
6)
7)
8)
2
28
40
5
71.5 or 143/2
130
49
8
9)
10)
11)
12)
13)
14)
15)
16)
27
5
126
220
64
16
41
24
17)
18)
19)
20)
21)
22)
23)
24)
64
16
60
84
156
14
100
43.8
25)
26)
27)
28)
29)
30)
31)
32)
24
196
105
7
25
76
9
30
© 2016 by Number Dojo, www.NumberDojo.com
33)
34)
35)
36)
37)
38)
39)
40)
525
29
22
70
3
54
99
11