1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Shkiper50 [21]
3 years ago
7

Craig has a building block in the shape of a rectangular pyramid. A net of which is shown below.

Mathematics
1 answer:
Alex787 [66]3 years ago
3 0

Answer:

the answer is D: 294 sq. cm

Step-by-step explanation:

first you want to split the net into 4 triangles and 1 rectangle

a = 12 cm

b =  6 cm

d = 13 cm

calculate the surface area of the pyramid...

1st find the area of the rectangle base

Rectangle base area

b x a = (6 cm) (12 cm)

= 72 sq. cm

next find the area of the triangle on the left

Left triangle

1/2(b)(d) = 1/2 (6 cm)(13 cm)

= 1/2 (78 sq cm)

= 39 sq. cm

Since all the triangles are congruent (same), you will need to multiply by 2 to get the combined area of the triangle on the left and on the right.

Area of left & right triangles

= 2 (39 sq. cm)

= 78 sq. cm

Find the area of the triangle on the bottom

Bottom triangle area = 1/2 (a)(a)

= 1/2 (12 cm) (12 cm)

= 1/2 (144 sq. cm)

= 72 sq. cm

Since the bottom of the triangle is congruent to the top triangle, multiply that by 2 to get a combined area of the triangle on the bottom and top

Area of top & bottom triangles

2 (72 sq. cm) = 144 sq. cm

Finally...add the area of the 4 triangles to the area of the rectangular base

72 + 78 + 144 = 294 sq. cm

You might be interested in
Find the other endpoint of the line segment if:
Vesna [10]

Answer:

<em>( - 15, - 16 ) </em>

Step-by-step explanation:

Coordinates of midpoint are ( \frac{x_{1} +x_{2} }{2} , \frac{y_{1} +y_{2} }{2} )

( - 5 + x ) / 2 = - 10 ⇒ x = - 15

( 4 + y ) / 2 = - 6 ⇒ y = - 16

<em>( - 15, - 16 )</em>

5 0
2 years ago
Jake is wrapping a gift that is in a box with the following dimensions.
dybincka [34]

Answer:

Because you are looking for square inches of wrapping paper, you are looking for the surface area of the box. A three-dimensional box has a top and bottom that are the same size, a front and back that are the same size, and 2 sides that are the same size...or SA = 2(top/bottom area) + 2(front/back area) + 2(side/side area). Our equation fills in nicely like this:

SA = 2(6 * 14) + 2(6 * 8) + 2(14 * 8)

SA = 2(84) + 2(48) + 2(112)

SA = 168 + 96 + 224

SA = 488 square inches of paper to wrap the box.

Step-by-step explanation:

8 0
3 years ago
I need help with this question for math: "There are 5,280 feet in a mile. What part of a mile, in decimal form, will you drive u
monitta

Answer: About 0.1894 of a mile will be driven until you reach the exit 1000 feet if there are 5280 feet in a mile.

Units are used to describe the quantity of an object.

Given the conversion rate:

5280 feet = 1 mile

Next is to convert 1000feet to miles, we can write:

1000feet = x

Divide both expressions to get the value of x

This shows that about 0.1894 of a mile will be driven until you reach the exit 1000 feet

Step-by-step explanation:

8 0
2 years ago
Write this in an equation: 5 less than a number is twice the sum of that number and 9
pochemuha

Answer:

n-5=2n+9

Step-by-step explanation:

3 0
2 years ago
Find the area of the figure, in square meters, to 1 decimal place. pls hurry n be honest with the answer ​
aliina [53]

Answer:

379.20

Step-by-step explanation:

You have to find the area of the rectangle which is 16 times 8 and that is 128

Then you have to find the area of the left and right semicircles this is 3.14 times 4 squared (because 8 is the diameter 4 is the radius) and this is 50.24

Next you need to find the area of the top and bottom semicircles this is 3.14 times 8 squared (because 16 is the diameter and 8 is the radius) and this is 200.96

then you just add it all up and its 379.20

6 0
3 years ago
Read 2 more answers
Other questions:
  • Three litres of milk cost r29,95 at shop a and two liters of milk cost r15,95 at shop
    6·1 answer
  • Solve for n: -4 (3n+3) = 5 (-2-6n) -2
    13·2 answers
  • Two cars leave a city and head in the same direction. After 5 hours, the faster car is 20 miles ahead or
    5·2 answers
  • Rewrite it as a function and isolate y. ​
    8·1 answer
  • Explain how to use a number line to compare two integers
    9·1 answer
  • John Sells Hamburgers For $3 Each and cheeseburgers for $3.50 each. One afternoon, he sells a total of 24 burgers for $79. How M
    5·1 answer
  • Evaluate the expression when a = 3, b = 2, and c= -3: (a³ + 2bc)/( c² -5)
    14·1 answer
  • A baker bought 88.9 ounces of coconut. The next day, she used 7.4 ounces of it to make coconut frosting. How much coconut does t
    15·1 answer
  • (b)Newton has bought 12 dozen copies in Rs 4320. His expenditure to bring the copies
    10·1 answer
  • The picture is above I’ll mark as brainliest.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!