The circumference of an isosceles triangle is 16 cm, the height at the bottom is 4 cm, how many cm is the waist Think () + () = the circumference of an isosceles triangle Let () be X Equation ()

The circumference of an isosceles triangle is 16 cm, the height at the bottom is 4 cm, how many cm is the waist Think () + () = the circumference of an isosceles triangle Let () be X Equation ()

Let the bottom edge be x and the waist be y
x+2y=16
（0.5X）²+4²=y²
It is concluded that x = 6, y = 5
Namely waist length 5 inside

The lengths of the two sticks are 5cm and 9cm respectively. The third stick should be selected and nailed into a triangle. If the length of the third stick is odd, there are () possible lengths of the third stick
A 4 B 5 C 6 D 7

B 5 5 + 9 > n. n + 5 > 9, N + 9 > 5, 14 > n > 4, n = 5.7.9.11.13

The lengths of the two sticks are 5cm and 7cm respectively. The third stick should be selected and nailed into a triangle. If the length of the third stick is even, the value of the length of the third stick is ()
A. Three species B. four species C. five species D. six species

According to the trilateral relation of triangle, the length of the third stick is more than 2cm but less than 12cm. If the length of the third stick is even, it should be 4cm, 6cm, 8cm and 10cm