how to do this question plz ​

How To Do This Question Plz

Answers

Answer 1

Answer:

a) root77

b) 2 root77 / ~17.55 cm^2

Step-by-step explanation:

a) by using Pythagorean Theroem,

a^2 + b^2 = c^2

2^2 + b^2 = 9^2

4 + b^2 = 81

81 - 4 = b^2

77 = b^2

root77 = b

b) 1/2bh is the quation for area thus,

area = 1/2 ( 4 ) ( root77)

area = 2 root77

or area = ~17.55 cm^2

Answer 2
Answer:

h = [tex]\sqrt{77}[/tex]

A =[tex]2\sqrt{77}[/tex]

Step-by-step explanation:

Rules for solving this problem:

Isosceles triangle rules

∠C = ∠ABC = BA

Because of isosceles being made up of two right triangles; using the pythagorean theorem we can deduce that

(1/2 x AC)² = BC² - h² (1/2 x AC)² = BA² - h²

Area of a triangle

A = 1/2 (Base x Height) = 1/2 * bh

Step 1 - Find the height

[tex]h =\sqrt{9^2 - ((1/2)AC)^2} = \sqrt{9^2 - ((1/2)~4)^2} = \sqrt{9^2 - 2^2} = \sqrt{81-4} = \sqrt {77}[/tex]

Step 2 - Find the area

[tex]A = \frac{1}{2}bh = (\frac{1}{2})(4)(\sqrt{77}) = 2 \sqrt{77}[/tex]

Hope this helps,

  - J.M.Jamon

        Pennsylvania State University

        Full-time B.S.CE. undergrad student


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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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Answers

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Step-by-step explanation:

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Answers

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Step-by-step explanation:

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40 - 1, 2, 4, 5, 8, 10, 20, 40

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Answers

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