x+y = 40−19
x+y = 21
h2 + x2 = 102
h2 + y2 = 172 −
−−−−−−−−−−−−−−−−−−−−−−
x2 − y2 = −189
x2 − y2 = −189
x = 21−y
(21−y)2 − y2 = −189
441 − 42y + y2 − y2 = −189
−42y = −630
y = 15
h2 + 152 = 172
h2 = 289 − 225
h2 = 64
h = 8
| 19+40 | ||
P = | * 8 = 59 * 4 = 236 cm2 | |
| 2 |