We can solve for the 3 triangle sides.
The left side is easy 6.
Second side² = 7² + 4²
Second side² = 49 + 16
Second side = square root (65)
Second side =
<span>
<span>
<span>
8.0622577483
</span>
</span>
</span>
Third Side² = 7² + 2²
Third Side² = 53
Third Side =
<span>
<span>
<span>
7.2801098893
</span>
</span>
</span>
When we know 3 sides, we use Heron's formula for calculating area:
Perimeter =
<span>
<span>
<span>
21.3423676376
</span>
</span>
</span>
Semi-Perimeter =
<span>
<span>
<span>
10.6711838188
</span>
</span>
</span>
Using Heron's Formula
area = square root (<span>10.6711838188 * </span><span>4.6711838188 * </span>
<span>
<span>
<span>
2.6089260705
</span>
</span>
</span>
*
<span>
<span>
<span>
3.3910739295
</span>
</span>
</span>
)
area = square root (441)
area = 21
Yes, it's just that "easy". LOL
1) Associative
2) Reversal
3) Addition
4) Commutative
5) Multiplicative Inverse
6) Additive Inverse
7) Reversal
8) Substitution
<u>RATE AS BRAINLIEST</u>
Step by ... 8*x^2+7*x-15-(-7)=0 ... 3.2<span>Solving 8x2</span>+7x<span>-8 = 0 by Completing The Square .</span>
The answer is C. (2,-2) u just search it up online and there are million answers