3 * 7 = 21, so

Then

and you can rationalize the denominator to write this as

Answer:
26
Step-by-step explanation:
its correct
So what you would want to do is plot the points in a graph, when you do so you line the points and it will give you a triangle.
So in conclusion it should be, a.) Isosceles
Answer:

Step-by-step explanation:


















~
The bottom one is 70 the top one is 60 I’m not good at explaining things so sorry if you need it