3. How many even positive integers less than 100 can be written using the numbers 3, 4, 5, 6, and 7?

twelve

Step-by-step explanation:

these are:

4 6 34 36 44 46 54 56 64 66 74 and 76

according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation:

the answer is a beach is the best place to be