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Pie
3 years ago
15

Area of a triangle with a base length of 4in and a height of 9in

Mathematics
1 answer:
Aleks04 [339]3 years ago
4 0
18 inches sqa-wared. "Nailed it!"
4 \times 9 =  36 \\ 36 \div 2 = 18
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The school hall is 4 times as long as it is wide. If the perimeter is 55m, what is the length? and what is the width?
12345 [234]
-- The width of the school is ' W '.  We don't know what that is yet,
but we're going to find out.

-- We're told that the length is 4 times as much.  So the length is ' 4 W '.

-- Perimeter is (2 widths) + (2 lengths).

2 widths = 2 W
2 lengths = 8 W
Perimeter = 10 W

-- We're also told that the perimeter is 55m.  That's just what we need.

10 W = 55 m

Divide each side of this equation by 10:

W = 5.5 m

There's the width !
The length of the hall is 4 times as much.

Length = 4 W = 22 m


6 0
3 years ago
Sonya’s average so far is 84 for 3 math tests. What must she get on the fourth test to have an average of 88
ioda

Answer:

she will need to get a 100 on the fourth test

Step-by-step explanation:

(252+x)/4 = 88

252+x = 352

x = 100

7 0
2 years ago
Tamara spun the arrow on a spinner 50 times. The number of times the arrow landed on each colored section of the spinner is show
lord [1]

Answer: 1/2 or 23/50

Step-by-step explanation:

Sorry no steps

3 0
3 years ago
PLZ HELP! Will GIVE BRAINLIEST
tatuchka [14]

Answer:

The answer is D

Step-by-step explanation:

It will be slightly more than 15 because it is 15.707963267...

6 0
2 years ago
PLEASE HELP I HAVE NO IDEA HOW TO ANSWER THIS :(
dolphi86 [110]

The other 2 angles of given right angles are 61.93° and 28.072°, if a triangle with side lengths 8, 15, and 17 is a right triangle by the converse of the Pythagorean Theorem.

Step-by-step explanation:

The given is,

                 Right angled triangle,

                 Side lengths are 8, 15, and 17  

Step:1

                The given triangle is right angle triangle by the converse of Pythagorean theorem, so the trigonometric ratio,

               Ref the attachment,

               For angle a,

                            ...................................................(1)

                 Where,  Opp - 8

                                Hyp - 17

                 From equation (1),

                                      

                                      = 0.470588

                                      (0.470588)

                                   a = 28.072°

                    For angle b,

                                  ...................................................(1)

                 Where,  Opp - 15

                                Hyp - 17

                 From equation (1),

                                      

                                      = 0.882352

                                      (0.882352)

                                   b = 61.93°

Step:2

          Check for solution for right angle triangle,

                        90 ° = Other 2 angles

                        90 ° = a + b

                        90 ° = 28.072° + 61.93°

                        90 ° = 90 °

Result:

          The other 2 angles of given right angles are 61.93° and 28.07°, if a triangle with side lengths 8, 15, and 17 is a right triangle by the converse of the Pythagorean Theorem.

7 0
3 years ago
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