caption: Calculate the area of this triangle.
exif: {"Image DocumentName": "Calculate the area of this triangle.", "Image ImageDescription": "9cm. 21cm. Area = \u00d7 21cm \u00d7 9cm = cm\u00b2. 2.", "Image XResolution": "200", "Image YResolution": "200", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}