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Crank
3 years ago
5

Trên 1 nửa mặt phẳng có bờ chưa tia Ox vễ 2 tia Oy và Oz sao cho góc xOy = 60 độ , góc xOz = 120 độ . a. Tính số đo góc yOz b.Gọ

i Ot là tia đối của tia Oy .Tính số đo góc của xOt c. Trên hình vẽ có tia nào là tia phân giác của 1 góc ? Vì sao ? Tia Ox là tia phân giác của góc zOt không ? Vì sao?
Mathematics
1 answer:
Ad libitum [116K]3 years ago
6 0
Sorry i don’t understand would love to help u tho
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In △XYZ , XZ=9 , YZ=4 , and XY=7 .
Mamont248 [21]

Answer:

A=6\sqrt{5}\ units^2

Step-by-step explanation:

we know that

Heron's Formula is a method for calculating the area of a triangle when you know the lengths of all three sides.  

so

A=\sqrt{s(s-a)(s-b)(s-c)}

where

a, b and c are the length sides of triangle

s is the semi-perimeter of triangle

we have

a=9\ units,b=4\ units,c=7\ units

Find the semi-perimeter s  

s=\frac{9+4+7}{2}=10\ units

Find the area of triangle

A=\sqrt{10(10-9)(10-4)(10-7)}

A=\sqrt{10(1)(6)(3)}

A=\sqrt{180}\ units^2

Simplify

A=6\sqrt{5}\ units^2

8 0
3 years ago
Solve the equation 3x = 9.5 Show and justify each step you take to solve the equation . 3x = 9 Write the equation 9 Divide each
zimovet [89]

Answer:

3x=9.5, you would divide 3 on each side to get x by itself, so (3x)/3=9.5/3, which would lead to be x=9.5/3 or x= 3 and 1/6th, 3 + 1/6

Step-by-step explanation:

4 0
3 years ago
I need help if you answer I will mark as brainlylist and extra points
german

Answer:

8b*5b

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Write the ordered pair that describes a point 12 units down from and 7 units to the right of the origin.
emmainna [20.7K]
(-7,-12) s it both down and to the right of the origin
8 0
3 years ago
Read 2 more answers
What is the percent change from 1800 to 1926
Crank
The percentage change is 6.54%
You have to divide 1800÷1926, then multiply by 100 and you'd get 93.46, then subtract 100-93.46 which equals 6.54% :)
4 0
3 years ago
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