9. Which of the following side lengths would create a triangle? A. 3cm, 5cm, 8cm
B. 6cm, 7cm, 12cm
C. 9cm, 9cm, 19cm
D. 10cm, 5cm, 4cm

wedfghjkl;

tyuiop[]ghjkl;

step-by-step explanatio89

answer: answer: d) v= 1/6 bh  

step-by-step explanation:

since according to the given question,   a pyramid is placed inside a prism.

step-by-step explanation:

m∠5 + m∠3 = m∠1   is true.

m∠5 + m∠6 = 180 is true

m∠2 +m∠3 = m∠6   is true

m∠2 +m∠3 +m∠5 = 180   is true