Answer:
a = -15
Step-by-step explanation:
multiply both sides by 3, then you get a = -15
Answer:
The legs of this triangle are both 3cm.
Step-by-step explanation:
Since this triangle is isosceles, the two unknown sides have the same length. Use Pythagorean Theorem because it is a right triangle. See image.
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I think the answer is the second one. The formula is suppose to be constant/the same for when finding the whole area of the whole shape.