Answer:
215cm
Step-by-step explanation the length labeled 10cm and 15cm is a rectangle ;it will be length ×width
10cm×15cm=150cm
triangle= half ×base ×height
0.5×10cm×9cm=45cm
[0.5×5×3]2 we multiply by 2 because there are two of the same kind =15cm
then we find the area of the rectangle which is at the center of the triangles
5cm×10=50cm
150±50±15=215
