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allochka39001 [22]
3 years ago
5

Which reason justifies the last step in a proof that ∆DEF ≅ ∆DAB?

Mathematics
1 answer:
lesya [120]3 years ago
7 0
Hey there, Sheriawilright!

The correct answer should be C since we are given two sides AD is congruent to ED and D is the midpoint of Line BF meaning that BD and BF are the same. Also, it makes both lines make a vertical angle meaning they are the same. So we have two sides and an angle between, so the answer is Side Angle Side.

Thank you for using Brainly.
See you soon!
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Can someone simply explain how to find the area of a triangular prism ? step by step ^^;
Vika [28.1K]
The formula:
A = bh + L (s1 + s2 + s3)

A: area
b: base
h: height
L: length
s1: side 1 (cross-sectional area)
s2: side 2 (cross-sectional area)
s3: side 3 (cross-sectional area)

Here’s an example (see attached image)

A = (4 x 6) + (12 x [7 + 7 + 4])
A = (24) + (12 x 18)
A = 24 + 216
A = 240cm^2

I hope this helped? Comment if you need more explanation or anything!

8 0
2 years ago
How many different groups of 6 shirts can be formed from 10 shirts for a display
Margarita [4]
I believe the shirts are different (in color, in size, in style,...), is so then:

¹⁰C₆ = (10! )/( 6! )( 10-6) ! = 210 COMBBINATIONS
6 0
3 years ago
Read 2 more answers
A book sold 35400 copies in its first month of release. Suppose this represent 9.7 % of the number of copies sold to date. How m
Nata [24]

Answer:

ADDDDDDDD

Step-by-step explanation:

7 0
2 years ago
Exactly 120 tickets were sold for a concert. The tickets cost $12 each for adults, $10 each for seniors, and $6 each for childre
Gemiola [76]
A=adult tickets
c=chlderenticekts
s=sinior tickets

a=c

a+c+s=120
2a+s=120

total made is 1100
12a+6c+10s=1100
sub
a=c
12a+6a+10s=1100
add
18a+10s=1100

multiply first equation by -9 and add to other equation

-18a-9s=-1080
18a+10s=1100 +
0a+s=20

s=20
20 senior tickets were sold

answer is B
5 0
3 years ago
The sum of the measures of the interior angles of a convex pentagon
ipn [44]

Answer:

for any pentagon the interior angles add up to n-2 times 180 degrees.

n-2

180(n)

7 0
3 years ago
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