Area of rectangle = Length x width, Area of triangle - (1/2) base x height Surface Area is the sum of the area of all of the faces.
Your picture has 5 faces: 1) rectangle on the left 2) square in the middle 3) rectangle on the right 4 & 5) 2 congruent (identical) right triangles
Area of face #1: 5 x 4 = 20 Area of face #2: 4 x 4 = 16 Area of face #3: 3 x 4 = 12 Area of face #4: (1/2) x 3 x 4 = 6 Area of face #5: (1/2) x 3 x 4 = 6 Sum of the Area of the faces: 60
Answer: Surface Area of the figure is 60 units²
Volume = Length x width x height = 5 x 4 x 3 = 60 units³
<span>To calculate the percentage increase: First: work out the difference (increase) between the two numbers you are comparing. Then: divide the increase by the original number and multiply the answer by 100. 1520-950=570 570÷950= 0.6 × 100=60%
Reason number 1 (before) is that you could contaminate your samples if you have foreign material on your hands. Reason number 2 (after) is that you could spread<span>/or ingest dangerous chemicals or substances that you have handled in the lab.</span>