Page 198 - NUMINO_WB_3A
P. 198
117_G3U8_WB_CA_˙—» ¿º 2011.4.5 8:20 PM ˘ ` 24 PDF_In 2540DPI 150LPI T
117-S1-2
3. Find the time at which the two hands of a clock make an obtuse angle.
half past 8 eleven o’clock three o’clock
5 minutes before 2 30 minute after 2
4. A new figure is made by joining equilateral triangles with a side length
of 3 cm each without any overlapping regions, as shown below. If the
new figure has a perimeter of 33 cm, how many equilateral triangles
were used to make the figure?
117-S1-2
3. Find the time at which the two hands of a clock make an obtuse angle.
half past 8 eleven o’clock three o’clock
5 minutes before 2 30 minute after 2
4. A new figure is made by joining equilateral triangles with a side length
of 3 cm each without any overlapping regions, as shown below. If the
new figure has a perimeter of 33 cm, how many equilateral triangles
were used to make the figure?
