Answer:
320
Step-by-step explanation:
42^2-38^2= (42+38)(42-38)
=80*4
=320
Just count the units and that should give you 7 units.
Answer:
45
Step-by-step explanation:
20 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 = 45
An equilateral triangles has 3 equal sides and 3 equal angles.
All the angles of an equilateral triangle have a measure of 60 degrees.
Using the Pythagorean theorem, the length of the hypotenuse squared is the length of one leg squared plus the length of another leg squared.
Here's the equation for the Pythagorean theorem.
Let c be the length of the hypotenuse.
Let a and b be the length of the two legs.
a^2 + b^2 = c^2
Have an awesome day! :)
