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Shtirlitz [24]
3 years ago
5

Find the area the figure is not drawn to scale 6.9 cm 4 cm

Mathematics
1 answer:
Grace [21]3 years ago
4 0
Please check attached file to see if you mean the same triangle. 

Basically, to find the area of a triangle, you are going to use the formula :
 A = b × h        where b is base, h is height.
          2

others also use the formula: <span> Area=1/2(bxh)</span>

Based on the figure, we have 6.9 cm (base) and 4 cm (height) as given.
Let us work out on the area of the said triangle.
A= <u>6.9cm × 4cm</u>
             2

  = <u>27.6cm</u>²<u>
</u>       2
A= 13.8 cm²


Hope this helps!
   

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Answer:

Therefore the angle of intersection is \theta =79.48^\circ

Step-by-step explanation:

Angle at the intersection point of two carve is the angle of the tangents at that point.

Given,

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The tangent at (0,0,0) is     [ since the intersection point is (0,0,0)]

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Again,

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The tangent at (0,0,0) is    

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If θ is angle between tangent, then

cos \theta =\frac{r'_1(0).r'_2(0)}{|r'_1(0)|.|r'_2(0)|}

\Rightarrow cos \theta =\frac{(2,0,0).(1,5,2)}{2.\sqrt{30} }

\Rightarrow cos \theta =\frac{2}{2\sqrt{30} }

\Rightarrow cos \theta =\frac{1}{\sqrt{30} }

\Rightarrow  \theta =cos^{-1}\frac{1}{\sqrt{30} }

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Answer:

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Step-by-step explanation:

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