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Tpy6a [65]
2 years ago
10

Find the perimeter of ABCD Find the area of Area

Mathematics
1 answer:
san4es73 [151]2 years ago
7 0

Step-by-step explanation:

A = (1, 3)

B = (3, 6)

C = (9, 2)

D = (7, -1)

the distance between 2 points is given by the Pythagoras equation based on the coordinate differences as legs of virtual right-angled triangles.

AD for example we get from

AD² = (7-1)² + (-1 - 3)² = 6² + (-4)² = 36 + 16 = 52

AD = sqrt(52) = sqrt(4×13) = 2×sqrt(13)

and AB we get from

AB² = (3-1)² + (6-3)² = 2² + 3² = 4 + 9 = 13

AB = sqrt(13)

the perimeter of the given rectangle is

2×sqrt(52) + 2×sqrt(13) = 2×2×sqrt(13) + 2×sqrt(13) =

= 6×sqrt(13) = 21.63330765...

and the area of the rectangle is

2×sqrt(13)×sqrt(13) = 2×13 = 26

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cestrela7 [59]

The 3 inside angles of a triangle need to add up to 180 degrees.

You have two angles of 104 and 36.

A = 180 - 104 - 36 - 40

The answer is 40

4 0
3 years ago
Read 2 more answers
What is the sum of the numbers in the series? 15 + 11 + 7 + . . . + (–129)
babymother [125]
Using Gauss's method
Total number of terms = [15-(-129)]/4+1=36+1=37
Add
S=15+11+7+....-125-129
S=-129-125-...+7+11+15
--------------------------------
2S=-114-114-114...(37 times)
=>
sum=S=(1/2)*(-114)*37=-2109


Using AP, T(n)=15+11+7+....-129
T(n)=19-4n  => T(1)=15, T(37)=-129
S(n)=(1/2)(37)(T(1)+T(37)=(1/2)37(15-129)=2109
3 0
3 years ago
What would the class size be if 30 people represent 40% of the class?
anastassius [24]

Answer:

110 students

Step-by-step explanation:

%40 Divide 30

30 divided by %40 is 0.75

SO there is 60% left

%60 divided by 0.75

That is 80

80 + 30 =

110

6 0
3 years ago
Given f(x)= -x^2+3x-4 and g(x)=2/3x +5 find f(g(-9))
scZoUnD [109]

Answer:

0

Step-by-step explanation:

First, you plug -9 into g(x) and you get g(-9) = - 1. After that, you solve f(-1), which you then reach the solution of 0 by solving.

6 0
3 years ago
Lilihoops1010 is asking for help! Go help them!
-BARSIC- [3]

Answer:

Okay! I'll go help! (◠‿◕)

7 0
3 years ago
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