For this case as MNOP is a square then the angles of each vertex are equal to 90 degrees.
Therefore, we have the following equations:

From these equations, we can clear the values of the unknowns.
For equation 1 we have:


For equation 2 we have:


Answer:
The values of t and f are given by:

Answer:
10cm2
Step-by-step explanation:
A=1÷2×4×5=10cm2
Answer:
4056
Step-by-step explanation:
39 necklaces
104 beads/necklace
number of beads = number of necklaces * number of beads per necklace
number of beads = 39 * 104 = 4056