Can you plz help me plz

the top one is 20cm

The bottom one is 25

Step-by-step explanation:

The formula for a triangle is 1/2 (base) x (height) so in this case 1/2x8x5=20 and 1/2x5x10=25

1. 20 2. 25

Step-by-step explanation:

Formula for triangle: Length times width divided by 2.

1. 8 x 5 / 2 = 20

2. 5 x 10 / 2 = 25

Hope this helped! If it did, please mark it brainliest! It would help a lot! Thanks! :D

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3