Altura de un trapecio cuyas bases miden 38cm y 18cm y el area es 197cm² ?

Área del trapecio :

<img src="https://tex.z-dn.net/?f=a%3D%20%5Cfrac%7B%28B%2Bb%29h%7D%7B2%7D%20" />

Altura

h = \ frac{a(2)}{B + b}

B = 38 cm

b = 18 cm

a = 197 <img src="https://tex.z-dn.net/?f=%20cm%5E%7B2%7D%20" />

1.

H = \ frac{a(2)}{B + b}

2.

H = \ frac{197 <img src="https://tex.z-dn.net/?f=%20cm%5E%7B2%7D%20" />(2)}{38 cm + 18 cm}

3.

H = <img src="https://tex.z-dn.net/?f=%20%5Cfrac%7B394%20cm%5E%7B2%7D%7D%7B56%20cm%7D%20" />

4.

H = 7.

035 cm.