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Allushta [10]
2 years ago
13

Suppose the sphere below with radius r has a surface area equal to 45 units

Mathematics
2 answers:
Vsevolod [243]2 years ago
5 0
A. 180 units 2,,,,,,
Leviafan [203]2 years ago
3 0

Answer:

180 units 2 ..............

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WILL GIVE A BRAINLEST
Gnoma [55]

Answer: "No, the triangles are not necessarily congruent." is the correct statement .


Step-by-step explanation:

In ΔCDE, m∠C = 30° and m∠E = 50°

Therefore by angle sum property of triangles

m∠C+m∠D+m∠E=180°

⇒m∠D=180°-m∠E-m∠C=180°-30°-50°=100°

⇒m∠D=100°

In ΔFGH, m∠G = 100° and m∠H = 50°

Similarly m∠F +∠G+m∠H=180°

⇒m∠F=180°-∠G-m∠H=180°-100°-50=30°

⇒m∠F=30°

Now ΔCDE and ΔFGH

m∠C=m∠F=30°,m∠D=m∠G=100°,m∠E=m∠H=50°

by AAA similarity criteria  ΔCDE ≈ ΔFGH but can't say congruent.

Congruent triangles are the pair of triangles in which corresponding sides and angles are equal . A congruent triangle is a similar triangle but a similar triangle may not be a congruent triangle.


8 0
3 years ago
Read 2 more answers
Find the area of the sector:<br> A=<br> yd? (Round to one decimal place)<br> 210°<br> 16 yd
Alexeev081 [22]
469.1 yd^2 because I plugged it into the equation and I got that as the answer
7 0
2 years ago
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What is the name for facts in subtraction problems
12345 [234]

The name for facts in subtraction problems: Fact Family is a group of math facts that uses the same numbers, for addition, and subtraction.

Answer: =====> I believe is, Subtraction Fact Strategies, or Fact Families.



1. ). Strategy: ===> Think Addition:

1.). Subtraction Description ====> Using the known addition fact to solve the subtraction problem. Ex. 13-5, think what goes with 5 to make 13?


2.). Strategy: ===> Fact Families

2.). Subtraction Description ====> Think of the fact family to recall the missing number.


3.). Strategy ===> Build Up Through

3.). Subtraction Description ===> Ten Used when either the subtrahend or minuend is 8 or 9. Ex: 14-9: start with 9 and work up through 10: 9 and 1 is 10 and 4 more makes 5.


4.). Strategy ==> Back Down Through Ten

4.). Subtraction Description: ==> Working backward with 10 as a “bridge”. Ex. 15-6, Take 5 away from 15 to get to ten. Then take one more away, leaving 9.




Hope that helps!!! : )

6 0
3 years ago
The height of a standard coffee cup
Zinaida [17]

Answer:

7 centimeters

Step-by-step explanation:

Standard size of a coffee cup is 7 centimeters

7 meters is too big

7 kilometers  is bigger than 7 meter

7 millimeters is too small

7 0
3 years ago
Christopher has breakfast at a cafe and the cost of his meal is $36.00.Because of thy e service,he wants to leave a 10% tip.
Arte-miy333 [17]

Answer:

The tip would be 3 dollars and 60 cents.

All together the cost would be 39 dollars and 60 cents.

Simply multiply 36 times .10 and you get 3.6.

7 0
3 years ago
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