Could somebody help me I don't understand any of this. Could someone show me or tell me how to work the problems?
1. Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm
A.8
B.21
C.15
D.225
2.The length of a hypotenuse of a right triangle is 13cm. The length of one leg is 5cm. Find the length of the other leg.
A.14
B.144
C.8
D.12
3.Which of the triangles decribed in the table are a right triangle?
Triangle | Side 1 | Side 2 | Side3 |
Q | 25 | 20 | 15 |
R | 26 | 20 | 14 |
S | 25 | 20 | 1026 |
T | 25 | 26 | 650 |
Answer choices:
A. (Q)
B. (R)
C.(S)
D.(T)
4.Point E is located at point (-2, 2) and point F is located at (4, -6). What is the distance between point E to F?
A.52 squared
B.28 squared
C.10
D.20 squared
11 years ago
11 years ago
1. a^2 +b^2 = c^2
9^2 + 12^2 = c^2
81 + 144 = c^2
225 = c^2
sqrt(225) = sqrt (c^2)
c = 15
2. 5^2 +b^2 = 13^2
25 + b^2 = 169
25-25 + b^2 = 169-25
b^2 = 144
b= 12
3. Q
15^2 +20^2 = c^2
225 +400 =c^2
625 = c^2
c = 25
4. Sqrt (4-(-2)^2 + (-6-2)^2))
Sqrt (36 + 64)
= 10
11 years ago
1.
Pythagorean theorem
c = sqrt ( a ^ 2 + b ^ 2 )
c = sqrt ( 9 ^ 2 + 12 ^ 2 )
c = sqrt ( 81 + 144 )
c = sqrt ( 225 )
c = 15
Answer C
2.
Pythagorean theorem
b = sqrt ( c ^ 2 - a ^ 2 )
b = sqrt ( 13 ^ 2 - 5 ^ 2 )
b = sqrt ( 169 - 25 )
b = sqrt ( 144 )
b = 12
Answer D
3.
Pythagorean theorem
c = sqrt ( a ^ 2 + b ^ 2 )
Answer A
becouse :
c = sqrt ( 20 ^ 2 + 15 ^ 2 )
c = sqrt ( 400 + 225 )
c = sqrt ( 625 )
c = 25
4.
The Distance Formula :
d = sqrt [ ( x2 - x1 ) ^ 2 + ( y2 - y1 ) ^ 2 ]
In this case :
x1 = - 2
x2 = 4
y1 = 2
y2 = - 6
d = sqrt [ ( 4 - ( - 2 ) ) ^ 2 + (- 6 - 2 ) ^ 2 ]
d = sqrt [ ( 4 + 2 ) ^ 2 + ( - 8 ) ^ 2 ]
d = sqrt [ 6 ^ 2 + ( - 8 ) ^ 2 ]
d = sqrt ( 36 + 64 )
d = sqrt ( 100 )
d = 10
Answer C
11 years ago
bob, You need to study the Pythagorean theorem.
11 years ago
There is no "tagging" or "hashtagging" on Jiskha, thank goodness!!
And you should watch the time. You posted at 2:23 am!! ~ This website is set for Eastern (US) time, and most of the tutors are in either Eastern or Central time zones.
6 years ago
1. C
2. D
3. A
4. C
5. B
6. A
7. A
8. B
9. Workpad
6 years ago
Hal is correct!!!! TY
6 years ago
HAL TYSM
6 years ago
Number 9 is wrong dont trust him or you will moss out on points but the rest are right
5 years ago
He is just putting workpad meaning that you will have to do it yourself. You should know that already.
5 years ago
he was saying that because some classes have a essay question others have a abcd question
5 years ago
yoOOO hal is right :D
4 years ago
Hal is right
4 years ago