Answer: 120 cm.
Step-by-step explanation: Each triangle has 3 sides, and each side is 1 cm. Multiply the number of sides for one triangle by the total number of triangles. 3 x 40=120. The perimeter is 120 cm.
Answer:
A heart will beat 140 times in 2 minutes
Step-by-step explanation:
700 ÷ 10 = 70
140 ÷ 70 = 2
Answer:
5_7=2 9_3=6. 5+7=12 9+3=12
Step-by-step explanation: