3,2,9 because the factors of 18 are ... 6,9,2,3
9. Area of a triangle is proportional to height. If the height increases by a factor of 4, then ...
The area will increase by a factor of 4. . . . . (2nd selection)
10. The base lengths and height are needed:
• 5 mm
• 8 mm
• 10 mm
The answer is 1000+600+80+9. please give brainliest