These orange lines in this picture are ______.
‘I wind about, and in and out.' What kind of a picture does this line create in your mind?
Some plants have a unique photosynthetic pigment. The leaves of these plants appear to be yellow and orange. Which pigment makes this leaves appear yellow and orange?
Draw a line segment AB of length 8 cm. At each end of this line segment, draw a line perpendicular to AB. Are these two lines parallel?