Lesson 12 of 15
Checkpoint: formulas, calendars and slips
Show on a big screenFour questions on the last three ideas. Feedback comes right away. Retry whenever you want.
A regular triangle has sides of 9 cm. Which formula and value are right?
The two diagonals of a calendar square each add to 54. What is the top-left date?
A plus of five calendar dates adds to 95. What is its middle date?
Which line is right?
0 of 4 answered
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